DMN Training Presentation

DMN-WESTINGHOUSE

Basic Training and Product Overview

DMN-WESTINGHOUSE

• Components for the bulk solids industry• High quality at competitive prices• World-wide sales network• ISO 9001• ATEX 94/9/EC

DMN Offices5 sales offices• DMN Noordwijkerhout (head office) (1950)• DMN Schüttguttechnik (1991)• DMN, Incorporated (1995)• DMN UK (1998)• DMN France (2003)

2 production facilities• DMN Noordwijkerhout , Holland (Rotary Valves)• Gesra (2000), Germany (Diverter Valves)

DMN UK• Founded in 1998• Sales office and Workshop in Calne, Wiltshire• Dedicated Northern England & Scotland sales engineer• Refurbishment service • Maintanence and servicing contracts & surveys• Upgrading existing valves to ATEX requirements• Large UK stock of Morris couplings available next day.• Member of SHAPA

World-wide network

AL Rotary Valve DesignStandard “Drop – Through” valve

BL Rotary Valve DesignStandard “Blowing - seal” valve

Rotary Valve Construction

Body

End Cover

Rotor

Seals

Bearings

What does a rotary valve do?

The main purpose of a rotary valve to maintain a pressure differential.

This is done by creating an air seal using a multi-vane rotor.

Rotors rotate within the valve housing with typical clearances of 0.13mm giving an air seal while feeding material.

Rotary Valve Applications

Air Lock Application

Vacuum dust extraction filtration unit.

Valve being used to contain negative vacuum within the system.


Metering Application

Silo discharge pneumatic conveying system.

Valve used to meter product into a conveying line at a given rate while maintaining an air lock.


Explosion & Flame Containment

Explosion & flame containment – “APS” Autonomous Protective System.

Rotary valves commonly used to protect systems, containing the explosion within the system and stopping the flame path through the valve.

ATEX Regulations

Three basic components required to cause an explosion.

• Fuel (Dust)• Ignition source (Non protected electronics)• Oxygen

ATEX RegulationsTypical DUST ATEX Zoning

• Loading Hopper and valve most likely area for explosion to occur (Zone 20)

• Area directly outside of loading hopper (Zone 21)

• Further away from concentrated dust area explosion least likely of zoned areas (Zone 22)

ATEX RegulationsTypical GAS ATEX Zoning

• Underground fuel cell most likely area for explosion to occur (Zone 0)

• Fuel pump area (Zone 1)

• Further away from concentrated gas area explosion least likely of zoned areas (Zone 2)

Rotor DesignsReplaceable blades – Used with abrasive materials. Blades can be easily replaced to maintain tight clearances rather replace complete rotor.

Reduced capacity rotor – Used on metering applications when a specified throughput is required with a good level of accuracy.

Rotor DesignsSemi end-disc rotor – Used when handling abrasive material offering additional wear protection

Closed end rotor – Commonly used when handling pelletized products such as plastic pellets. Closed end disc gives protection against end cover wear.

Rotor DesignsScalloped pocket / Radius pocket rotor – Smoothed root pockets used to help discharging sticky / hydroscopic products.

Reduced capacity, multi-pocket, dosing rotor – Mostly used in the food and pharmaceutical industries when handling expensive active ingredients.

Rotors Designs

• t

Seal Options

Gland Packing Lip Seals

Labyrinth – Spiral groove air purged seals

Wear Resistance OptionsCoatings Plasma sprayed tungsten carbide coating being applied to a BL end cover. Other coatings also available such as plasma and chrome.

Replaceable bladesReplaceable blades as standard with most of the DMN valve range. Hardox blades used for very aggressive products.

Components

• Rotary valves• Diverter valves• Slide gate valves & Butterfly valves• Morris couplings & Pipe & Bends• Options rotary valves

AL airlock• High filling efficiency• Shared angle inlet• Minimum air leakage• Explosion proof models

available up to 10 bar g• Customised solutions• Flanges drilled to PN10, ANSI

150 lbs and JIS• Flameproof versions available

suitable for St2 products• Available in 10 consecutive

sizes from 100-500

AML airlock• High filling efficiency• Large diameter inlet in

reference to the rotor volume• Minimum air leakage• Explosion proof models

available up to 10 bar g• Customized solutions• Housing with one round and

one square flange• Round flange drilled in

accordance with PN10, ANSI 150 lbs or JIS

• Suitable as transition piece from round to square and vice versa

AL/BL dairy valves

• USDA dairy approved• Easy removal of rotor for fast

and efficient cleaning• Smooth product contact

surfaces in food grade material• Rotor pockets radiused and

polished to Ra=0,8 μm• Rotor vanes chamfered on all

edges• Flame proof and explosion

shock resistant versions available

• BL available with enlarged inlet

AL/BL MZC valves

• Supporting bars for easy removal of rotor and end cover

• Direct drive or chain drive• USDA dairy approved models

available• Explosion shock resistant and

flame proof versions available• BL available with enlarged inlet

for cyclone and spray drier applications

SAL sanitary valve

• For sanitary use• Easy detachable rotor• Low capacity• Complete valve highly polished

Ra= 0,8 μm (inside and outside)• Product surfaces FDA approved• Maximum product temperature

up to 100 °C• System pressure up to 1 bar g• Available in 3 sizes: 80, 100 en

150• SAL 150 available in MZC

version

GL granular valve

• Maximum protection against product degradation

• High filling efficiency• Large air vent openings• Robust construction• Available with direct drive or

chain driven• Flanges drilled in accordance

with PN10, ANSI 150 lbs of JIS• Available in 5 sizes from 150-

350• Available in MZC version

(option)

ML medium duty valves

• ML(D), MAL(D) or MGL(D) version

• Easy detachable non-drive• Compact design• Substantial construction• Pressure surge proof up to

10 bar g• Sheared angle inlet• Large range of options

available• Airpurge shaft sealing optional• Flanges drilled to PN10, ANSI

150 lbs or JIS

DL cyclone or dust valve• Minimum air leakage• Polyurethane replaceable and

adjustable rotor blades• Universal flange, suitable for

both round and square counter flanges

• Pressure shock resistant up to 10 bar g

• Ex stock delivery• Optionally available with steel

fixed bladed rotor• Available in 3 sizes: 200,250

and 300

OS/GOS high capacity valves

• High capacity• Available as drop through

(OS) of blow through (GOS) versie

• High filling efficiency• Minimum air leakage• Square inlet and outlet• Customized solutions• Available in Ni-hard• Available in 3 sizes: 400, 450

and 500

MS knife valve

• Two cutting blades• Special shaped V-rotor• For abrasive applications• Solid construction• Available in 12 sizes from

390x530 to 1100x1320 inlet size

• Rotor volume from 58 liter – 940 liter

Components


2-3 TDV tube diverter• Available with 2 or 3 ports• Smooth product contact surfaces• Inflatable seals• Pressure from -0,8 up to 3 bar g• Multiple choice of line

connections• Minimised product degradation• Converging and diverging

applications• Easy detachable construction• Temperature range -20 °C up to

+100 °C• All stainless and aluminium

stainless configurations

M-TDV multiport diverter

• Up to 14 ports• Inflatable seals• All product contact surfaces

FDA approved• Converging and diverging

applications• Minimal product degradation• Pressure up to 3 bar g• Temperature range –20 °C to

+100 °C• Compact design

TDV tube diverter

• USDA dairy accepted• Smooth product contact

surfaces• Inflatable seals• Minimizes product degradation• Easy detachable construction• Compact execution available• Optional flexible stainless steel

tube• Available in 8 sizes from 40-

200 mm

PTD dual pipe plug diverter

• Pressure shock resistant up to 10 bar g

• Compact, 2-channel design• Minimal maintenance• User friendly design• No moving parts on the outside• Pressure up to 3 bar g (static

seals) • Optional pressure up to 6 bar g

available (inflatable seals)• Available in 7 sizes from 50-200• Quick clean version optional

available

SPTD single pipe plug diverter

• Single straight pipe• Universal application• For diverting only• Pressure up to 3 bar g• Maximum product temperature

80 °C• Static or dynamic sealing• No moving parts on the

outside• Available in 6 sizes from 150-

400

FDV flap diverter

• Compact design• Optimal sealing• Easy maintenance• Available with flange or pipe

fittings• Flanges drilled in accordance

with PN10, ANSI 150 lbs of JIS• In cast iron, aluminium or

stainless steel• Available in 7 sizes from 50-

250 (pipe versions up to 150)

FVV fill vent valve

• Saving system costs• Compact desing• Easy maintenance• Optimal sealing• Available with flange or pipe

fittings• Flanges drilled according to

PN10 of ANSI 150 lbs• In cast iron, aluminium or

stainless steel• Available in 6 sizes from 50-

150

BTD ball diverter

• For abrasive products• Suitable for systems with high

pressures and temperatures• Body made from ductile

spheroidal cast iron• Replaceable wear bushes on

outlet• Grease lubricated shaft seals• Seals can be replaced with the

valve in place• Available in 7 sizes from 65-

250

GPD gravity plug diverter• Rugged cast construction• Available in stainless steel AISI

316, cast iron and aluminium• Sealed, permanently lubricated

outboard bearings• Easy demountable design• Change on the fly with most

powders• One-piece body with removable

end plates and rotating blade assembly

• Pneumatic or manual operation• Flanges drilled according to PN10

or ANSI 150 lbs• Available in 4 sizes from 150-300

Components


Slide & Butterfly Valves• Manual or electro-pneumatic

operation• Suitable to fit between DIN or

ANSI flanges• Available in cast iron or

stainless steel

• Available in cast iron or stainless steel• Many types available in stock from

UK• Competitive pricing

Morris couplings

• The original Morris pipe coupling• Easy to install• Substantial and reliable

construction• Competitive pricing• Electrical conductivity

guaranteed• Available for practically every

pipe diameter• Large stock holding

Pipe & Bends• High performance ERW tubes • Aluminium ERW tubes • Perforated ERW tubes • Hollow sections • Stainless steel tubes • General purpose tubes to BS1387 • Cold drawn seamless tubes • Cold drawn welded tubes • Pneumatic conveying tubes• Long radius bends Offered in Mild Steel, Stainless Steel & Aluminium

Components


Options IRID Rotor Interference Detection• minimise damage to the rotary valve • warn of possible contamination of the conveyed product • simple make or break connection: the rotor is insulated from

the rest of the valve and if and when the rotor touches the casing, contact is made which is relayed to the system control

Options II

2. Drop out box(competitive pricing cast iron versions)

X1. Inlet restrictor (stainless steel)

3. Air vent box

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2

3

Thank you

Documents

DMN Training Presentation