NEEDLE VALVE , BALL VALVE , INDUSTRIAL VALVE , GLOBE VALVE , POPPET VALVE , MANUFACTURERS

VARDHMAN BEARINGS

WE AT VARDHMAN BEARINGS ARE MANUFACTURERS OF ALL TYPE OF VALVES …

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NEEDLE VALVE , BALL VALVE , INDUSTRIAL VALVE , GLOBE VALVE , POPPET VALVE , MANUFACTURERS

We at vardhman bearings are manufacturers and exporters of needle valves , high pressure needle valves ,

ball valves , low pressure needle valves , medium pressure needle valves , high pressure needle valves ,

brass needle valves , needle valves for natural gas , needle valves for water , globe valves , plug valves , ball

valves , needle valves manufacturers , clippard needle valves , flow control valves , pipe connecting valves ,

needle valves for low flow , industrial needle valves , hard sheet needle valves , 400 series needle valves ,

forged needle valves , needle valves for different applications , needle valves for general purpose , stainless

steel needle valves , weld type needle valves , valves used in pipelines , root type needle valves , root type

needle valves gauges , angular type needle valves , male pipe straight needle valves , SNV stop needle

valve , NE series needle valves , tube clamp fitting needle valves , needle control valves , 1700 series needle

valves , double needle valve , single needle valve , angular L shape needle valve manufacturers , pneumatic

needle valve , ball valve , butter fly valve , control valve , gate valve , flow limiter , plug valve , mass flow

controller , plastic pressure pipe system ,

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NEEDLE VALVE , BALL VALVE , INDUSTRIAL VALVE , GLOBE VALVE , POPPET VALVE , MANUFACTURERS

We at vardhman bearings are manufacturers and exporters of needle valves , high pressure needle valves , ball valves , low

pressure needle valves , medium pressure needle valves , high pressure needle valves , brass needle valves , needle

valves for natural gas , needle valves for water , globe valves , plug valves , ball valves , needle valves manufacturers ,

clippard needle valves , flow control valves , pipe connecting valves , needle valves for low flow , industrial needle valves ,

hard sheet needle valves , 400 series needle valves , forged needle valves , needle valves for different applications , needle

valves for general purpose , stainless steel needle valves , weld type needle valves , valves used in pipelines , root type

needle valves , root type needle valves gauges , angular type needle valves , male pipe straight needle valves , SNV stop

needle valve , NE series needle valves , tube clamp fitting needle valves , needle control valves , 1700 series needle

valves , double needle valve , single needle valve , angular L shape needle valve manufacturers , pneumatic needle valve ,

ball valve , butter fly valve , control valve , gate valve , flow limiter , plug valve , mass flow controller , plastic pressure pipe

system , 

Also we stock branded valves and imported valves like parker needle valves , parker v series needle valves , holumbury

valves , Hayward NVA series needle valves , china needle valves , SMC needle valves , TY-FLO needle valves , holumbury

valves , flow fit valves , FITOK needle valves , Chicago needle valves , festo needle valves , ideal needle valves , rotex

needle valves , janatic needle valves ,

A needle valve is a type of valve having a small port and a threaded, needle-shaped plunger. It allows precise regulation of flow, although it is generally only . An Instrument Needle Valve uses a tapered pin to gradually open a space for fine control of flow. The flow can be controlled and regulated with the use of a spindle. A needle valve has a relatively small orifice with a long, tapered seat, and a needle-shaped plunger on the end of a screw, which exactly fits the seat. 

As the screw is turned and the plunger retracted, flow between the seat and the plunger is possible; however, until the plunger is completely retracted the fluid flow is significantly impeded. Since it takes many turns of the fine-threaded screw to retract the plunger, precise regulation of the flow rate is possible. 

The virtue of the needle valve is from the vernier effect of the ratio between the needle's

length and its diameter, or the difference in diameter between needle and seat. A long travel axially (the control input) makes for a very small and precise change radially (affecting the resultant flow). 

Needle valves may also be used in vacuum systems, when a precise control of gas flow is required, at low pressure,[1] similar devices. such as when filling gas-filled vacuum tubes,gas lasers and

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Uses

Needle valves are usually used in flow metering applications, especially when a constant, calibrated, low flow rate must be maintained for some time, such as the idle fuel flow in a carburetor. 

Note that the float valve of a carburetor (controlling the fuel level within the carburetor) is not a needle valve, although it is commonly described as one. It uses a bluntly conical needle, but it seats against a square-edged seat rather than a matching cone. The intention here is to obtain a well-defined seat between two narrow mating surfaces, giving firm shutoff of the flow from only a light float pressure. 

Since flow rates are low and many turns of the valve stem are required to completely open or close, needle valves are not used for simple shutoff applications. Since the orifice is small and the force advantage of the fine-threaded stem is high, needle valves are usually easy to shut off completely, with merely "finger tight" pressure. The spindle and/or seat of a needle valve, especially one made from brass, are easily damaged by excessive turning force when shutting off the flow. 

Small, simple needle valves are often used as bleed valves in water heating applications. 

Unlike a ball valve, or valves with a rising stem, it is not easy to tell from examining the handle position whether the valve is open or closed.

vardhman needle valves with union-bonnet construction are available in a variety of materials, with working pressures up to 10 000 psig (689 bar) and temperatures up to 1200°F (648°C).

Specifications

Working Pressure Up to 6000 psig (413 bar)

Temperature –65 to 1200°F (–53 to 648°C)

Flow Coefficient 0.86

Body Material 316 stainless steel

Packing Material Grafoil

End Connections vardhman tube fitting, female NPT,

Type tube socket weld, pipe socket weld

Size 1/4, 3/8, 1/2 in.; 10 and 12 mm

Testing

Every 6DB series blowdown valve is factory tested with nitrogen at 1000 psig (69 bar). Seats have a maximum allowable leak rate of 0.1 std cm3/min. Shell testing is performed to a requirement of no

detectable leakage with a liquid leak detector.

Cleaning and Packaging

Every 6DB series blowdown valve is cleaned and packaged in accordance with Standard Cleaning and Packaging (SC-10).

Vardhman High-Pressure Needle Valves

Cold-worked 316 stainless steel body and high-pressure end connections enable working pressures up to 45 000 psig (3102 bar).

Specifications

Working Pressure Up to 45 000 psig (3102 bar)

Temperature –65 to 850°F (–53 to 454°C)

Flow Coefficient Up to 0.19

Body Material 316 stainless steel

Packing Material Glass-filled PTFE

End Connections

Type Straight-thread high-pressure female, female NPT

Size 9/16-18, 3/4-16, 1 1/8-12; 1/4 in.

Features

Replaceable, nonrotating stem design:

• provides easy valve maintenance• helps prevent galling or damage to valve seat.• Packing design enables external adjustment without removing valve from line• Rolled threads on stem shank• Easily replaceable seat in angle-pattern valve• Cold-worked body is standard; annealed body is available for sour gas service.• Weep holes provide leak detection.• Bonnet lock plate helps prevent accidental removal of bonnet.

Pneumatic ActuatorPneumatic actuators are available in normally open, normally closed, and double acting modes.

Testing

Every vardhman high-pressure needle valve is factory tested with water up to its maximum pressure rating

to a requirement of no detectable leakage at the seat and packing.

High-Pressure Needle Valve Options

Stem OptionsValve are standard with 440C stainless steel stems. 440C stainless steel with cobalt-based alloy stem tip and S17400 stainless steel stems are available.

High-Temperature Stem PackingGrafoil stem packing is available for temperatures up to 850°F (454°C).

Stem Packing KitsPTFE and Grafoil stem packing kits are available.

Replaceable SeatAngle-pattern valves have a one-piece replaceable seat with an integral female NPT or female straight thread high-pressure end connection. Seats are manufactured from 316 stainless steel and have silver-plated threads.

Stainless Steel Bar HandlesAnodized aluminum bar handles are standard; stainless steel bar handles can be ordered factory assembled.

Spare HandlesAnodized aluminum and stainless steel bar handles can be ordered as spare parts.

Sour Gas Valves Valves are available for sour gas service and meet NACE MR0175/ISO 15156. The valves have annealed

bodies and S17400 stems. The 410 series valve maintains its 10 000 psig (689 bar) rating. The 445, 645, and 945 series valves are rated to 18 000 psig at 100°F (1240 bar at 37°C) with high-pressure ports.

General Utility Service Needle Valves—VBGU Series

VBGU series needle valves are for use in general purpose applications to isolate or vent system media. The hardened stainless steel, nonrotating needle promotes leak-tight shutoff and long service life. The valve stem threads are isolated from the media.

Specifications

Working Pressure Up to 6000 psig (413 bar)

Temperature 0 to 650°F (343°C)

Flow Coefficient Up to 2.25

Body Material 316 stainless steel, carbon steel

Packing Material Carbon/glass-filled PTFE, graphite

End Connections

Type NPT, tube socket weld, pipe socket weld

Size 1/4 to 1 in.; 6 to 25 mm

Features

• Straight and angle patterns

• Compact design

• Stainless steel stop pin

• Stem threads above packing, protected from system media

•Nonrotating, hardened needle design for leak-tight shutoff and long service life

• Safety back-seating needle design seals in fully open position

• Suitable for sour gas service; materials are selected in accordance with NACE

MR0175/ISO 15156.

Testing Every VARDHMAN GU series needle valve is factory tested with nitrogen at 1000 psig (69 bar). Seats have a maximum allowable leak rate of 0.1 std cm3/min. Shell testing is performed to a requirement of no detectable leakage with a liquid leak detector.

Cleaning and Packaging Every VARDHMAN GU series needle valve is cleaned and packaged in accordance with Swagelok Standard Cleaning and Packaging (SC-10).

Options Antitamper Handle The antitamper handle reduces the risk of human error and deliberate tampering. The valve can be operated with the antitamper key. Round Lockable Handles The lockable handles can lock the valve in any position. These round handles are available in nylon and stainless steel.Handle KitsHandle kits are available for stainless steel bar and nylon and

stainless steel round lockable handles.   Antitamper Handle Antitamper Key Lockable Handle Antitampe

r

Handle

Antitamper

Handle

Lockable

Handle

Ball Valves - Gemel Italy

Gemels are an Italian based manufacturer who specialises in the production of ball valves for over 30 years. Gemels have a very board product range from 1/4 to to 10" for low and high pressure ( max 10.000 PSI/80 Mpa ) So far our products have been successfully engaged in a lot of industrial fields like chemical, marine, hydraulic and industrial automation. Gemels has already gained a wide business network together with many of customers all around the world.Machineries and Production :By using numerical control automatic and semi-automatic machineries, Gemels strives to achieve the best quality in the production, thanks also to a well trained technical team. Up to now Gemels obtained the following quality certifications : UNI EN ISO 900:2000, CE PED 0948 and TUV IT 07 ATEX 002 AR.

Ball Valves / Stainless Steel Ball valves / Carbon Steel Ball Valves - Gemel Italy

Gemels are an Italian based manufacturer who specialises in the production of ball valves for over 30 years. Gemels have a very board product range from 1/4 to to 10" for low and high pressure ( max 10.000 PSI/80 Mpa ) So far our products have been successfully engaged in a lot of industrial fields like chemical, marine, hydraulic and industrial automation. Gemels has already gained a wide business network together with many of customers all around the world. 

Machineries and Production : By using numerical control automatic and semi-automatic machineries, Gemels strives to achieve the best quality in the production, thanks also to a well trained technical team. Up to now Gemels obtained the following quality certifications : UNI EN ISO 900:2000, CE PED 0948 and TUV IT 07 ATEX 002 AR.

PV Series Needle Valves – Rising Stem Plug Valve, ... Parker V Series Needle Valves are designed for positive leak tight shut-off and regulation of fluids in manufactures a complete line of precision Needle valves. Before ... In addition to the needle valves in this catalog, manufacturers other lines of spe Hydraulics - leading high pressure needle valves, weld type needle valve socket, weld type needle valves, root type needle valve gauge, anguler type ... needle valves offer secure, leak-free connections and provide the lowest overall cost of any instrument needle valve used in the market today. The Most Unique Needle Valve on the Market Today. TEE BAR. 316 Stainless Steel for maximum corrosion resistance, fastened to spindle by anti-vibration bolt ... Find here Needle Valves manufacturers, Needle Valves suppliers, Needle Valves producers, Needle Valves exporters, Needle Valves production centers, Definition of needle valve: A type of globe valve in which a long pin or needle, tapered at the end, moves in and out of a conical seat to regulate the flow of liquid. Needle Valves - Parker Autoclave Engineers needle valves are designed for high pressure and temperature gas and liquid applications. Available in multiple . We are manufacturing product include in Thermowells , Gauge Cokes, Gauge Saver , Manifords Valves, Pulsation Dampers/Snubbers, Gate Valves, Needle ... Manufacturer of Needle Valves for different applications. General Needle Valveinformation. Types of Needle Valves and Needle Valve suppliers. Locate your Needle Valves. BelGAS Standard Needle Valves offer four choices in 316 stain- ... Method of Calculating Flow: The flow coefficient “Cv” of a valve is the flow rate . 400 Series Standard, Hard Seat Needle Valves. 100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability; 10,000 psi pressure rating . VARDHMAN has been manufacturing Brass and Stainless Steel Needle valves. Our Series FNV, Forged Needle Valve is available in a wide , VARDHMAN Engineers - We are world class Manufacturers of Pressure Gauge Accessories and Needle Valves in India. Find company for Needle Valves .. NVA Series needle valves are available in PVC and GF-PP. They have FPM o-rings and a PTFE seat. End connections are threaded only and all valves ... Instruments needle valves with union-bonnet construction are available in a variety of materials and end connections.Pressure from 6000 Psi (413 Bar) up ... Micrometering (needle) valves combine the ease of connection associated with Valco zero dead volume fittings with convenient bulkhead mounting. The very .. A new addition to compliment our Series

HN39 and HN49 valves. HN39 Series Needle Valve Compact and economical high-pressure instrument valves. Needle Valves are available with choice of optional stem to provide ... stem tip typically used in high cycle application to extend the valve life. combines rugged construction, dependability and leak-free performance at high and low pressures into our needle valve products. MA957 Clogged Needle Valve Repair Procedure. Over time dirty CO2 gas flowing through the regulator will start to deposit dust and dirt in the small gas line ... Needle valves are made for various operating pressure and temperatures. ... DESIGN: Needle valves are also known as isolation valve, shut off valve or . It is called needle valve due to the shape of the closure member. It consists on a threaded stem with a conical end. Stems with fine threaded have a slow linear ... NE Series Needle Valve Economy Needle Valve Size range 1/4 Inch to 1/2 Inch Pressures range 6,000 psi. Material 316ss to Super Alloys. NF2 Series Flow ... Another reason for not leaving globe valves in the fully open position is that it is sometimes difficult to determine if the valve is open or closed. 741V Series needle valve applies low-viscosity fluids in accurate, repeatable amounts. Because the stainless steel needle seats in the tip adapter, there is ... Needle Valves are designed as per German Technology for accurate regulation and positive shut-off in impulse and instrument lines. Flutec team has .. TY-FLO® Needle Valves are 100% Helium leak tested to ... 1 For pressure ratings of valves with tube fitting end connections, see CBC-Lok® or CS-Lok® ..