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Copyright © 2013 NMF Techniek BV, Westerbroek The information in this catalogue is based on our considerable experience with the described products. There are many factors that influence the products’ functionality, among them the installation method and the way the installation operates. Therefore, general assumptions can change during usage. It is essential for the client to check the applicability of the individual products by testing them thoroughly. For these reasons and because of the wide scope of application of our products can NMF Techniek BV take no responsibility in individual cases regarding the accuracy of our recommendations. For specific applications, it is important to contact us. This catalogue has been compiled with the greatest care. However, it is possible that the information you find here is incomplete or incorrect. If this is the case, then please contact us by phone: +31 (0) 50 527 57 77, fax: +31 (0) 50 527 59 05, or e-mail: [email protected].

mailto:[email protected]

NMF Techniek BV ▪ Woortmansdijk 30 ▪ NL-9608 TB Westerbroek tel. +31(0)50 527 57 77 ▪ fax +31(0)50 527 59 05 ▪ [email protected] ▪ www.NMF-Group.com

Profitability in seals and swivel joints Due to the combining sealing systems, as well as 25 years of experience, NMF is in a position to offer the proper solution to solve sealing issues and to reduce the cost-of-ownership and downtime for its customers. Customised solutions is our daily job! Several product scan be supplied with certificates like the EC1935:2004, FDA compliance, TA-Luft, Fire-Safe, BAM, EN10204, etc. The frog is in our logo for a reason. When there is pollution, the frog is one of the first animals to suffer. With the frog we want to show we care for the environment and supply seals and swivels that do not leak during normal usage and are therefore environmental friendly and durable.

Lipseals in their most versatile form

� no “scoring” of the shaft! � pressure resistant to 8, 15 and even to 150 bar � rotational speed up to 40 m/s or 20.000 rpm � large variety in materials through modular form � very long life � when replacing run-in oilseals there is no need to

repair the shaft � low friction and therefore less wear

� lower power loss through less friction on the shaft

� easy to replace oilseals, stuffing box packing systems and mechanical seals

For prolonged life in pumps, mixers, gear boxes and many more applications

Mechanical seals for heavy duty

� pressure up to 8 bar and speed up to 8 m/sec � modular system for optimal adapting the seal to

the equipment � both positive transfer of torque and a large

depot for grease guaranty a long trouble free life � ready to fit cassette system, no adaption of the

installation necessary � with complete accessory and spare parts

program

For dynamic sealing of high-viscose, sticky and crust building media

Spring loaded seals for the highest tightness � spring loaded sealing systems according to TA-Luft /

VDI 2440 (approx. 100 bar, 450°C) and Fire-safe (160 bar, 750°C)

� long-time leak free due to spring supported compression of seal package

� TA-Luft conversion sets, complete with stuffing box packing, cover seal, spring sets and if required complete calculation checked by TüV for approval to TA-Luft suitability

For neutralising the stuffing box packing volume reduction due to usage, wear and aging

Dynamic seals for a long l i fe and an optimal operational certainty and profitabil i ty


The products in the NMF program comprise of a very complete package of special seals and swivels joints. Since dozens of years the sealing systems are used in the general-, chemical-, petrochemical- and steel industry, for paper production, agricultural, paints, water purification, machine building and food production installations. Important advantages are the life prolonging properties and the improved seal capacity, together leading to an improved seal system with higher reliability and a reduction in cost-of-ownership and downtime.

Camprofile gaskets third generation

� super elastic sealing element with an improved elastic recovery capacity

� reduced warehouse cost by integrating two or more pressure groups in one seal due to a break-away edge (patented)

� in compliance with EN 1514, EN 12560 as well as TA-Luft compliance

� ring-joints, spiral wound seals, welding seals and other special seals up to a diameter of 6 meter

� modern flange calculation software with standards according to EN 1591-1:2001, AD-Merkblatt 2000 B7/B8; ASME Code s.VIII and 4 more standards

To insure a tight flange coupling: flange calculation software for calculating the complete sealing system of the flanges

Special gaskets for installations in the high pressure and high temperature range

� spring loaded and blow-out safe seals according to the tension released construction principle

� spiral wound and carrier seals with a large resilience

� individual solutions for the optimization of a sealing system in e.g. for a manhole or high pressure heat exchanger

� including engineering, assembly and TüV approved and stamped documentation

To insure that regularly appearing fluctuations in pressure and temperature do not influence the sealing system and production process

Services at the installation

� conversion of valves to the TA-Luft-standard � repair, adaption, sealing and conversion of pumps

and valves to our seal system � measuring flanges with laser optics, assembly with

stretch bolt system � optimization of installations by hardening surfaces

with a layer welded on by laser � high chemical resistance, different layers are

available

Life prolonging, wear reduction, breakage preventing: use laser coted surfaces

Static seals in a large variety for control l ing extreme sealing situations


Swivel joints and rotary joints for complex and standard applications

Swivel joints in their most stable form

� for both liquid and gaseous media as rotating parts of the installation

� give pipes their proper position � available from 1/4” to 42”, in steel and stainless

steel � customisation possible due to a modular system � variable connections � movable arms as alternative for hoses � multi canal swivel joints on request with electrical

swivel joint to relay signals or power

For a reliable transport of media in a large variety of circumstances

Continuous rotating joints in many executions, light series

� diameters from 1/8” up to 4” � temperature up to 250°C � pressures up to 700 bar � mono-flow or duo-flow, fixed or rotating siphon � for media like water, air, vacuum, steam,

thermal- or hydraulic oil � for fast or slow rotation

Offering the possibility to transport one or more fluids between a fixed point and a rotating point

Hose loading arms and folding stairs for loading truck and railway with hoses or metal loading arms

� facilitating ease of operation and use � avoiding dangerous situations with smart

constructions � longer life of the hoses � higher safety level and lower risk of injuries during

operation by good handling system � environmental protection y guided hose movement � folding stairs up to 10 meter wide, safety cages,

optimisation of existing situations, etc.

Loading technology, individually adapted to the local situation

Visit us online on:

www.NMF-Group.com

NMF Techniek BV Tel.: +31(0)50 527 57 77 Woortmansdijk 30 Fax: +31(0)50 527 59 05 NL-9608 TB Westerbroek Email: [email protected]

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Table of Contents

Leakage and elasticity ............................................................................................................................................. 8

Possibilities and Limits ............................................................................................................................................ 9

Spring-loaded sealing systems for valves ............................................................................................................. 10

Compact Seals ...................................................................................................................................................... 11

Spring columns ...................................................................................................................................................... 14

Cover seals ........................................................................................................................................................... 15

The topic: TA-Luft .................................................................................................................................................. 16

Spring-loaded sealing systems for flanges ........................................................................................................... 17

Let's talk about elasticity ....................................................................................................................................... 18

A new component .................................................................................................................................................. 18

Design and documentation ................................................................................................................................... 19

Bolts....................................................................................................................................................................... 19

Seals...................................................................................................................................................................... 20

Applications Heat Exchangers and Manholes ...................................................................................................... 21

General Terms ...................................................................................................................................................... 22

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Leakage and elasticity In sealing systems where soft materials are used the initial stress decreases as a function of time and loading. The causes for that are in most cases:

Setting phenomena during operation Reduction in sealing material volume as a result of leakage Ageing of sealing material Influences from equipment operation, like pressure and temperature changes Faulty assembly

Elasticity through spring-loaded elements Since the sealing materials do not have enough self-elasticity for compensation of stress losses, additional elastic elements are inserted for minimization of the loss of stress so that inadmissible leakage rates cannot occur. The loss in sealing material volume caused by setting, material discharge through leakage and ageing will be compensated by follow-up pressing of counter-sealing faces through spring packs so that the actually existing sealing pressure is always higher than the sealing pressure required as minimum. The spring packages are selected according to the admissible drop of force across a specified spring path.

Share of spring characteristic of spring column in the overall

spring characteristic of the system Limit values for leakage Sealing systems with spring packs serve to ensure long-term tightness of sealing joints. The leakage limit values have been verified under test conditions. The following leak rates are admissible according to the following German codes and standards: TA-Luft With reference to VDI 2440, specific leak rates:

For stuffing-box packings: 10-4

mbar*l/(s*m) at temperatures <250°C 10

-2 mbar*l/(s*m) at temperatures >250°C

For flange gaskets: 10-4

mbar*l/(s*m) Live Loading No reference is made to a code or standard (only general designation for spring loaded sealing systems. However, the leak rates in DIN 3230 Part 3 should be guaranteed).

Flange Seal Bolt Springcolumn

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Possibilities and Limits The application range of spring-loaded sealing systems is dependent on the used soft materials, used spring materials, required leak rates, fluids to be sealed up and the environment of equipment where seals are installed. Application limits

Use for Application limits Certified to Certified by

TA-Luft ca. 100 bar / 450°C TA-Luft TüV Nord

Live-Loading 4.000 bar / 750°C

Fire-safe 160 bar / 750°C BS 6755 Part 2 SOBA Test Institute

Oxygen 70 bar / 400°C BAM

Application limits with respect to spring materials The specified values are applicable to the temperature admissible for the spring material. To minimize the effect of spring setting phenomena, the temperature to which the spring is actually exposed should be some 50K below the maximum admissible temperature.

Material Material No. Admissible temperature

Application

50CrV4 1.8159 DIN 17222 50 … +200°C Standard spring loaded system outside insulation and for spring columns without housing

X12CrNi17 1.4310 DIN 17224 -200 tot +200°C Favourably priced for chemical and cryogenic service and for spring column with housing, use according to ambient temperature

X35CrMo17 1.4122 SEW 400 -50 … +400°C

17.7PH Corresponds to1.4310

X22CrMoV12.1 1.4923 DIN 17240 -50 … +500°C Favourably priced for high-temperature service

Inconel X716 2.4669 200 … +600°C High-temperature service

Nimonic 90 2.4632 200 … +700°C For extremely high temperatures (e.g. on turbines)

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Spring-loaded sealing systems for valves The existing system solutions can be used for all types of valves from any manufacturer. Adaptations to the valve will be made in the spring-loaded sealing system so that easy installation is possible both for the initial outfit and for retrofitting of valves in service. Essential components are Spring columns:

Adapted to the setting behaviour of the packing

Adapted to customer’s specification Stuffing box packing:

Consists of clamping and sealing zone Design and purity according to customer’s

specification Cover or bonnet seal:

Highly wear-resistant seal of composite metal Selection according to customer's

specification

The design principle

Columns of standard design (modular construction principle for cost optimisation)

Permits easy service (no retrofitting is required for bolt replacement)

Packing

Constant volume Low friction Material cannot be discharged by effect of

leakage Good bridging of formed gaps

Recalculation of all seals by use of the design nomogram

In case of spring-loaded sealing systems meeting the requirements of the

norm “TA-Luft” the correctness of calculation must be demonstrated.

The documentation covers the data acquisition, the calculation proof of

compliance with the requirements of “TA-Luft”, the installation instructions,

the torque for tightening and the operational torques and if applicable, a

work certificate EN10204-2.2 on the used materials.

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Compact Seals Compact seals are universally applicable high-duty stuffing box packings with clampfitting and sealing zone. The composition of the packing and the used materials dependent on the service conditions and the fluids to be sealed. Types of packing

RGF KOMPAKT

Type TA

Type ST

Universally applicable in valves and fittings and specifically suited for sealing high pressures, fluids forming sediments or abrasive fluids or for use as sealing system ensuring long-time tightness (in combination with suitable spring-supporting system as packing sets meeting the requirements of “TA-Luft” or “Live loading”). Not suitable as seal for chloride-containing or heavily oxidizing acids. P max 4.000 bar T max 550 °C Consisting of: Clamp-fitting zone: Pure-graphite spring ring PS.C-X2.A2 Sealing zone: Pure graphite PO.G-A2.A2 The pure-graphite spring ring (RGF) Clamp-fitted rings, type RGF (pure-graphite spring ring), are made of multi-layer metal-reinforced graphite layers. The running face with flanged inside diameter serves to protect the stem from damage and to reduce stem friction. The clamp-fitted rings are made in standards design (type TA) and in one-side metal-reinforced design (type ST) for use in case of abrasive fluids or fluids with a trend to form sediments. To be used for stem diameters between 8 and 380 mm. Main fields of application Chemical engineering: Applications subject to the “TA-Luft” regulations, cracker, heavy fluids Power stations: Steam lines, high-pressure valves Petrochemical Industry: Applications subject to the “TA-Luft” regulations, cracker, fluids with a trend to form sediments

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PTFE KOMPAKT

Universally applicable in valves especially for sealing corrosive fluids, in valves with permanent stem movement and for long-time leak tightness (in conjunction with suitable spring-loading system as “TA-Luft” or “Live-Loading” packing set). Not suitable for sealing fluorine-containing fluids. P max 320 bar T max 280 °C Consisting of: Clamp-fitting zone: PS.F-E6.E6 Sealing zone: PS.G-D1.D7-A Main fields of application Chemical engineering: Applications subject to the “TA-Luft” regulations, corrosive fluids Foodstuff industry: Food production, mixers, boiling vessels Petrochemican Industry: Applications subject to the “TA-Luft” regulations, low-viscosity fluids

RGF - 3K

A packing system specifically designed for soot blowers, containing a soft packing for leakage minimization in the upper stem portion as 3rd component in addition to the components of pure-graphite compact packing. The system can be used also for sealing large-size gate valves in riser pipes (horizontal stem). P max 250 bar T max 450 °C Consisting of: Clamp-fitting zone: Pure-graphite spring ring PS.C-A2.A2 Sealing zone: Pure graphite PS.G-A2.A2 Upper sealing zone: PS.G-B1.C1 Main fields of application Chemical engineering: Applications subject to the “TA-Luft” regulations, corrosive fluids Foodstuff industry: Food production, mixers, boiling vessels

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MICA KOMPAKT

Can be used in valves for sealing oxygen and for fluid temperatures of more than 550°C. Application parameters for oxygen (BAM approval): P max 70 bar T max 400 °C Application parameters for high-temperature sealing (Fire-safe certificate to BS6755 part 2): P max 160 bar T max 750 °C (short-time temperature rise up to 900°C) Consisting of: Clamp-fitting zone: PS.C-X2.H1-S Sealing zone: PO.G-A2.A2-S Depending on the application conditions, the packing sets are made in different variants and are chemically cleaned, if necessary. When placing orders, the customer should inform about the specific application conditions. Main fields of application Power stations: Hot-steam gate valves, turbine seals Foundries: Oxygen steel-making Petrochemical Industry: POX and air decomposition plants

Delivery Compact packings are normally supplied as five-ring sets, i.e. 2 clamp-fitted rings and 3 rings for the sealing zone. When placing the order, please state if another number of rings is required. The RGF-3K-packing with 7 rings forms an exception. Deviations from the standard versions should be stated in the order. Each ring has a rectangular cross-section, i.e. ring height = packing width. Packings can be supplied with closed or slotted rings.

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Spring columns All three types of spring columns described below use identical spring paths and spring forces. Their existence in parallel to each other is for customer's specific requirements. The geometric data may be found in our separate data sheets.

TA-LUFT EXPERT

Spring columns preferentially used for the initial outfit since a bolt extension is required in contrast to versions without spring loading. Marking characters are used for allocation of columns to the different pressure stages and application cases as follows: s = short: n = normal; d = double; h = heavy. Application range:

Application cases subject to the “TA-Luft” requirements up to PN 100 Large-size series as initial outfit Variants for use in chemical engineering The graduation of forces permits a good adaptation to permanently

rotating shafts Spring materials: X12CrNi17 - 1.4310 (standard and cryogenic applications) X22CrMoV12.1 - 1.4923 (high-temperature applications) Housing parts: 1.4401 or 1.4571 Bolt sizes: M8 to M24

PROFECT LIVE-LOADING

Spring columns preferentially used for service since the bolt extension is already integrated in the spring column. The system is extremely robust, easy to handle and very cost-effective. Application range:

Application cases subject to the “TA-Luft” requirements up to PN 100 All Live-Load applications Versions for use in refineries and power stations Universally applicable to all bolt sizes to DIN and ANSI standard

Spring materials: 50CrV4 - 1.8159 (standard applications) X35CrMo17 - 1.4122 (corrosion-resistant version) X22CrMoV12.1 - 1.4923 (on request) Spring fixture: 1.4401 or 1.4571 Bolt sizes: M8 to M36; 3/8” to 1.1/2”

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PROFECT EXPERT

Spring columns are preferentially used in all application cases; combines the advantages of the type “TA-Luft Expert” (maintenance gap, completely made of stainless steel, completely encapsulated springs) with the advantages of the type “PROFECT Live-Loading” (integral bolt extension, for all thread sizes). Application range:

Application cases subject to the “TA-Luft” requirements up to PN 100 All Live-Load applications Universally applicable to all bolt sizes to DIN and ANSI standard

Spring materials: 50CrV4 - 1.8159 (galvanic coating, standard applications) X35CrMo17 - 1.4122 (version completely with stainless steel) Housing parts: 1.4401 or 1.4571 Bolt sizes: M8 to M36; 3/8” to 1.1/2” A huge advantage is, that when the volume of the packing decreases, a gap will be visible between the housing and the bottom of the spring column. This indicates a service interval has to be planned.

Cover seals The following cover seals are used:

Type Key No. Application range

SSTC TRD 401 FF.G-X1.A2 Live-Loading up to PN 160 “TA-Luft” applications up to PN 40 Not for chlorine-containing fluids

Grooved-metal seal with pure-graphite top layer with PTFE top layer

FK.A-X2.A2 FK.A-E6.E6

Live-Loading up to PN 320 “TA-Luft” applications up to PN 100 Top layers according to fluid

Spiral seal DSSF 1.4571/ pure graphite 1.4571PTFE

FS.N-X1.A2 FS.N-X1.E6

Live-Loading up to PN 320 “TA-Luft” applications up to PN 100 Sealing material according to fluid

MICA seals For sealing up oxygen and for use in high-temperature applications

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The topic: TA-Luft

The system has had been certified by TÜV Nord and authorised to convert, equip and retrofit valves made to “TA-Luft” requirements, provided the following prerequisites are met:

Delivery of the calculation proof of tightness by use of the certified calculation programme “TA-Luft Expert”

Use of the sealing materials specified in the TÜV certificate Installation work performed by authorised and well trained

specialists Preparation of documentation

The first supplement confirms the compliance with VDI 2440. The applicable TÜV test reports, comparisons between reference and actual leak rates to VDI 2440 and special literature, assessment reports and reference lists are gladly presented by us.

Design and calculation Design or a sealing system in compliance with the “TA-Luft” requirements is not possible without sufficient information about the valve concerned. All data required for calculation may be recorded in a data sheet prepared by us and to be used as the basis for material procurement and documentation. This documentation may differ according to customer's requirements but the following date are normally included:

Calculation certificates regarding the sealing system One APZ 2.2 data sheet on the used materials One parts list of items supplied by us

The documentation has been prepared so that all information on equipment subject to obligatory supervision can be presented to the competent supervisory board.

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Spring-loaded sealing systems for flanges The existing system solutions can be used independent of the flange type and its geometry. Adaptations that might be required will be implemented inside the spring-loaded sealing system. Essential components are Tensioning elements:

Adapted to the setting behaviour of seal Adapted to customer's specification

Seal:

Construction according to customer's specification

Adapted to the operation conditions Calculated according to test and operation

conditions Bolts:

High-strength materials Safety certificate to DIN 2505

The concept

Standardized sizes Universally applicable up to 500°C The compression can be set by varying the

number of springs and the seal width

Compound metal seals Defined spring-back effect Highest sealing effect through labyrinth rings Design with or without web

Bolts with expansion shank to standard KSW

11

Spring-loaded sealing systems for flanged connections are preferentially used for solution of problems in plants already in existance. Therefore, the quick availability of all components is a prominent feature of the used systems. Up to bolt size M36, all components can normally be supplied within three days. The documentation comprises the required data, the calculation proof of leak tightness and the safety proof for the overall system, the installation instructions with the specification of the tightening and operating torques and a works certificate EN10204-31 on the used materials.

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Let's talk about elasticity In the beginning, leaks on flanged connections most frequently occur during start-up and shut-down of plants, since these operating situations generally have the highest temperature and pressure changes. Start-up process

Heating from inside to outside Risk of excessive stressing of bolt and seal Leaks produced by uneven expansions

Shut-down process

Lower stressing of bolt and seal The risk exists that the actual sealing pressure drops below the required minimum so that sealing

material is carried out Small leakages during the start-up and shut-down process frequently cause the extraction of sealing material, and insufficient sealing pressure during operation may cause permanent leakage as a starter for further destruction of the seal.

A new component Additional components are used to maintain the sealing pressure evenly under changing operating conditions and to compensate setting phenomena of the seal and ageing of the whole sealing system: clamping rings with elasticity much higher than the overall elasticity of the remaining sealing system.

CLAMPING RINGS, TYPE GS

Application range: Spring steel 50CrV4 to 150 °C Stainless steel 1.4310 to 250 °C (equivalent to 17.7PH) Stainless steel 1.4923 to 500 °C Inconel X718 to 600 °C, highest corrosion resistance Bolt sizes: Metric: M8 to M100 (larger on request) UNC: 1/4” to 4” (larger on request)

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Design and documentation A safe sealing connection must be based on thorough design of seal, bolts, use of suitable materials and proper assembly. The sealing system has been designed by means of the computer program WT-Expert. The torque for tightening and the arrangement of springs are among those values from the great number of output data that are relevant for the user.

This program forms a part of the TÜV documentation. The program furthermore permits:

selection of seals according to type and geometry selection of bolt material including safety analysis the safety analysis under the aspect of leakage

and considers two test conditions and one operating condition plus the emergency case.

Bolts The used bolts are reduced-shank bolts made to works standard KSW 11 with their main dimensions adapted to DIN 2510 and their threaded portion extended for adaptation to the spring-loaded system. The material will be selected according to the load conditions and the specific application case. The following bolt materials are preferentially used: 1.4930 for very corrosive media 1.7711 standard applications The material for the nuts shall be selected one material grade lower.

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Seals Different seal types with a long service life are offered for specific application cases. Various material combinations are possible for construction of the sealing system.

DSSF

Spiral Wound seals with defined resilience characteristic (Key No. FF.S-X2.A2) Designed as standard flange gaskets, as tank seal with or without webs and as cover/body seals for valves Made from pure graphite, PTFE or MICA/RG with spirals of 1.4571, Inconel or Monel See also our Static Seals catalogue.

KP1

Grooved metal gaskets with groove spacing 1 (Key No. FK.A-X2.A2) Designed as standard flange gasket, as tank seal with or without webs and as cover/body seals for valves Made from pure graphite or PTFE with groove rims of 1.4401 or 1.4571

SUPER HPC

Grooved metal gaskets with groove spacing 1 (Key No. FK.A-X2.A2) Designed as standard flange gasket, as tank seal with or without webs and as cover/body seals for valves Made from pure graphite or PTFE with groove rims of 1.4401 or 1.4571

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Applications Heat Exchangers and Manholes

SHELL-AND-TUBE HEAT EXCHANGERS / PIPELINE FLANGES

Spring-loaded sealing systems in flanges require setting of springs with working range in both directions. Thus stresses which occur during start-up and shut-down can be compensated. Flanged connections with long bolts subjected to heavy temperature variations are most susceptible to leaks.

MANHOLE, HEAD AND HAND HOLE COVERS

Spring-loaded sealing systems in cover joints subjected to internal pressure are preferentially used to maintain the minimum sealing pressure during start-up and shut-down processes at a low internal pressure (surface pressure of seal < 25 N/mm²). Since the seals are commonly rather high, spring columns are needed for large travel. When the internal pressure reached a definite value, the spring force as the sealing force will now be substituted by the pressure loading of cover. The following materials are preferentially used as sealing materials: SSTC TRD 401 Super HPC supplied by the Frenzelit company.


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1.DEFINITIONS

In these terms and conditions "the Company" means NMF Techniek BV, "the Customer" means the person or Company with whom the

Contract is made and “the Goods" means the products sold by the Company to the Customer. The Manufacturer being VR Dichtungen

B.V. and GmbH.

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These Terms and Conditions are part of all our quotations until and also include the agreements and acceptance of orders and/or

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Our prices are for delivery ex works Groningen unless otherwise agreed in writing. The prices are ex packing and freight. These prices

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6. -

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The delivery times are given by the Company as exact as possible, but are without engagement and not binding. When delivery times

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Delivery is ex warehouse Groningen or ex warehouse of our suppliers. The goods are with regard to delivery time and risk transit

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wrongly mounted or added to otherwise than by the Company or in a manner approved in writing by the Company.

In the event of an order being to a Customer's specification or design the Company shall be under no liability of any kind in respect of the

Goods being fit for any particular purpose, even if such purpose is made known to the Company. A claim in relation to any goods in

accordance with any of the foregoing provisions shall not entitle the customer to cancel the Contract or any part thereof or to refuse to

take delivery of or to pay for those goods or any other goods(whether under the same or any other Contract).

The Company only gives a guarantee in case the Manufacturer gives a guarantee.

12.CLAIMS

The Customer has to check the goods upon arrival. In case of visual defects, wrong quantities or errors in sizes the Customer has to put

in a claim with the Company within ten (20) days after the date of invoice and the shipping date. The Company will not accept any later

complaints.

13.The Customer shall indemnify the Company against all actions, costs, (including the cost of defending any legal proceedings), claims,

proceedings, accounts and damages in respect of any infringement or alleged infringement of any patent, registered design, copyright,

trade mark or other industrial or intellectual property rights resulting from compliance by the Company with the Customer's instructions,

whether express or implied.

14.IMPORTS

The Customer shall be responsible for complying with any legislation rules or regulations governing the importation of the goods and for

the payment of any duties thereon and for obtaining any necessary licences and permissions to enable the goods to be imported into the

country of destination.

15.DISPUTES

All disputes or claims which may arise out of or in connection with the Contract shall be referred to an Arbitrator in Groningen, The

Netherlands. The choice of Arbitrators to be agreed between parties to be either a qualified Judge, the Chairman of the Chamber of

Commerce or a third party, who is an agreed choice of both parties and as a just man, or just men, shall give a reasonable and binding

advice. The Arbitrator shall apply Dutch law.

16.APPROPRIATE LAW

The Contract shall in all respects be governed by and construed in accordance with the law of the Netherlands and the Customer admits

to the jurisdiction of Dutch Courts.17.COURTIn case parties decide to go to court, the following rule will apply: if parties decide to go to

court, they will have to go to a Dutch Court in Groningen, The Netherlands and proceed according to Dutch Law;18.In case of difference

of opinion about this translation, the Dutch text will in all cases prevail for this difference in opinion.

Groningen, September 1, 1991

Documents

N MF Spring Loade d Valveseals