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VAISHNAVI HYDRAULICS PVT. LTD.  |  INDIA  
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    You Are Here : Needle Valves
NEEDLE VALVES
  • Needle valves have a slender, tapered point at the end of the valve stem that is lowered through the seat to restrict or block flow.
  • Fluid flowing through the Needle valve turns 90 degrees and passes through an orifice that is the seat for a rod with a cone shaped tip.
  • Needle valves are widely used to accurately regulate the flow of liquids and gases at low flow rates.
  • The fine threading of the stem and the large seat area allow for precise resistance to flow.
  • Needle valves are used to control flow into delicate gauges,which might be damaged by sudden surges of fluid under pressure.
  • Needle valves are also used in situations where the flow must be gradually brought to a halt, and at other points where precise adjustments of flow are necessary or where a small flow rate is desired.
  • They can be used as both on/off valves and for throttling service.
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  • Needle valves are often designed with a metal needle (generally brass, bronze, or stainless or other alloys of steel) and an elastomeric seat (generally PVC, CPVC, PTFE, or a wide range of brand name plastics and thermoplastics).
  • While this is the most common form, valves are available that have metal - metal, plastic - plastic, or plastic- metal needles and seats.
  • These variations are usually designed with specific applications in mind, especially situations where corrosion, high or low temperatures or extensive wear are possible.
  • In such cases, it is best to consult with the manufacturer to find which type of valve is best for the application at hand.
  • Needle valves are used in almost every industry in an incredibly wide range of applications - anywhere control or metering of steam, air, gas, oil, water or other non-viscous liquids is required.
  • They can be found in every industry from aerospace to zoological sciences, every service from gas and liquid dispensation to instrumentation control and cooling to power generation.
  • However, Needle valves should be avoided in applications where the media is viscous, or in the dispensation of slurries.
  •   The small flow orifice can easily trap thick materials or solids and become blocked.
  • VE-LOCK® Brand Make Needle valves are available in materials like - Steel, Stainless Steel, Brass, Monel, & various Alloy & Non Alloy steel
  • VE-LOCK® manufacturer Needle valves with Low pressure design up to 3000 Psi, High Pressure design up to 6000 psi & Very High Pressure Design up to 10000 psi ( On Request Only)


  • NEEDLE VALVES- Tube to Tube End - For Hydraulic Applications
  • Needle valves tube to tube end are applicable for the systems where we have use Seamless tubes ( Metric / Inch Od / Inch NB types ) & to connect this tube end to this Needle valves we have to make Ball valves with Tube end & to Provide Nut & Ferrule Ring to get this tubes Grip with Valves Body.
  • Needle vales with Hydraulic tube end utilise in Paper Industry, Steel Plant manufacturer, Power Pack Manufacturer, Aircraft construction equipments, SPM, Process Machineries, Hydraulic Power Booster Units.

  • Needle Valves with tube to tube end connection are available in below types & sizes:

    Needle Valve Tube to Tube End W.P.- BAR Series Sizes for Threads Types of Threads Available CLICK to Submit
    6 MM to 15 MM OD 250 Light 6 MM to 15 MM Metric Threads both end Enquiry Form
    18 MM to 22 MM OD 160 Light 18 MM to 22 MM Metric Threads both end Enquiry Form
    28 MM to 42 MM OD 100 Light 28 MM to 42 MM Metric Threads both end Enquiry Form
    6 MM to 12 MM OD 630 Heavy 6 MM to 12 MM Metric Threads both end Enquiry Form
    14 MM to 25 MM OD 400 Heavy 14 MM to 25 MM Metric Threads both end Enquiry Form
    30 MM to 38 MM OD 250 Heavy 30 MM to 38 MM Metric Threads both end Enquiry Form


    Materials
    • Valve Body - Steel Phosphatised / Yellow chromatize / trivalent Zinc Blue Passivation
    • Valve Body - STAINLESS STEEL -304 / 316
    • Valve Spindle - Steel, Stainless Steel 304 / 316
    • SEALING - Copper washer sealing / Metal sealing
    • SEALING - WITH O RING -NBR - ( Viton - O ring - On Request at Extra Cost only)
    • Handle - made out of Steel or Stainless Steel
    • W.P. = Low Pressure = 200 bar & High Pressure up to 400 bar
    • Optional - M.S. -Powder coating on request only
    • All other Parts are trivalent Zinc with Blue passivation


    NEEDLE VALVES - Tube to Tube End - For Instrument Compression type
  • Needle valves tube to tube end are applicable for the systems where we have use Seamless tubes ( Metric / Inch Od / Inch NB types ) & to connect this tube end to this Needle valves we have to make Ball valves with Tube end & to Provide Nut & Ferrule Ring to get this tubes Grip with Valves Body.
  • High Pressure Needle valves are widely used for Severe Service Operation as regulating and shut off type in critical High pressure up to 10,000 psi.
  • High Pressure Needle valves are also used for vacuum application on fluid line connections like natural gas lines, Gas sampling Lines, Pressure Test Bench, Control panels, Instrument Air lines, Steel Plant, Hydraulic Power packs, High Pressure Manifolds, Drain vents, Pressure Gauges, & Transmitters.

  • Needle Valves with Tube to Tube End W.P.- BAR Series Sizes for Threads Types of Threads Available CLICK to Submit
    1/8" OD up to 2" OD Tube Size 400 Heavy 1/8" up to 2" UNF Threads both end Enquiry Form
    6 mm up to 50 mm Tube Size 400 Heavy 6 mm up to 50.8 mm UNF Threads both end Enquiry Form

    needle valves manufacturers, integral bonnet needle valveanguler type needle valve, industrial needle valve suppliers
    Materials
    • Valve Body - Steel Phosphatised / Yellow chromatize / trivalent Zinc Blue Passivation
    • Valve Body - STAINLESS STEEL -304 / 316
    • Valve Spindle - Steel, Stainless Steel 304 / 316
    • SEALING - Copper washer sealing / Metal sealing
    • SEALING - WITH O RING -NBR - ( Viton - O ring - On Request at Extra Cost only)
    • Handle - made out of Steel or Stainless Steel
    • W.P. = Low Pressure = 200 bar & High Pressure up to 400 bar
    • Optional - M.S. -Powder coating on request only
    • All other Parts are trivalent Zinc with Blue passivation


    HYDRAULIC NEEDLE VALVES - Screwed End - Low Pressure
  • Needle valves Low Pressure Series used for Application in Hydraulic Systems where W.P. requirements are up to 3000 Psi & Test pressure up to 4500 Psi.
  • Needle valves controlls & Maintain Pressure of the fluid inside the Hydraulic systems at the set desired value.
  • Needle valves are available in Steel, Stainless Steel, Brass Materials & can be applicable for Low pressure Application, High pressure Application & for water application also.
  • Low Pressure Needle valves can be made in Cast body / Forged body & also in Solid bar stock body.

  • VE-LOCK®manufactures Needle Valves from Solid bar stock Materials & all parts details are as below.
    Needle Valves Series Sizes For Threads Types of Threads Available CLICK to Submit
    Needle valves with Female Threads 3000 6000 1/4" up to 2" BSPP/BSPT/NPT/UNF Enquiry Form
    Needle valves with Male Threads 3000 6000 1/4" up to 2" BSPP/BSPT/NPT/UNF Enquiry Form
    Needle valves with Metric Tube Od 3000 6000 6 mm upto 42 mm od Metric Threads with Nut + Ferrule Enquiry Form
    Needle valves with UNF Tube Od 3000 6000 1/4" od up to 2" od UNF Threads with Nut + Ferrule Enquiry Form
    Needle valves with Tube to Thread End 3000 6000 6 mm upto 42 mm od Metric to Bspp threads Enquiry Form
    Needle valves with Flanges 3000 6000 1/4" NB up to 5 " NB SAE Flange/ ERW Flange Enquiry Form
    Needle valves with QRC End 3000 6000 1/4" up to 2" BSPP/BSPT/NPT/UNF Enquiry Form

    Needle Valve
    Materials
    • Valve Body - Steel Phosphatised / Yellow chromatize / trivalent Zinc Blue Passivation
    • Valve Body - STAINLESS STEEL -304 / 316
    • Valve Spindle - SS 321 / 304 - On request - SS 316 ( At Extra Cost )
    • SEALING - Copper washer sealing / Metal sealing
    • SEALING - WITH O RING -NBR - ( Viton - O ring - On Request at Extra Cost only)
    • Handle - made out of Steel or Stainless Steel
    • W.P. = Low Pressure = 200 bar & Test pressure up to 3000 psi • Optional - M.S. -Powder coating on request only
    • All other Parts are trivalent Zinc with Blue passivation



    NEEDLE VALVES - Screwed End - High Pressure Needle valves
  • High Pressure Needle valve regulates Working Pressure up to 6000 Psi & Burst Pressure up to 10000 Psi.
  • High Pressure Needle valve can be Manufacture up to Working Pressure 10000 psi & Burst pressure up to 15000 psi.
  • High Pressure Needle valves are available in Steel, Stainless Steel, Brass Materials & can be applicable for Fluids like water, Oil, Petrol, Grease, chemicals, viscous gases.
  • Needle valves can be made in Forged body & also in Solid bar stock body.
  • High Pressure Needle valves are widely used for Severe Service Operation as regulating and shut off type in critical High pressure up to 10,000 psi.
  • High Pressure Needle valves are also used for vacuum application on fluid line connections like natural gas lines, Gas sampling Lines, Pressure Test Bench, Control panels, Instrument Air lines, Steel Plant, Hydraulic Power packs, High Pressure Manifolds, Drain vents, Pressure Gauges, & Transmitters

  • VE-LOCK® manufactures High Pressure Needle Valves from Solid bar stock Materials & all parts details are as below:
    Needle Valves Series Sizes For Threads Types of Threads Available CLICK to Submit
    Needle valves with Female Threads 3000 6000 1/4" up to 2" BSPP/BSPT/NPT/UNF Enquiry Form
    Needle valves with Male Threads 3000 6000 1/4" up to 2" BSPP/BSPT/NPT/UNF Enquiry Form
    Needle valves with Metric Tube Od 3000 6000 6 mm upto 42 mm od Metric Threads with Nut + Ferrule Enquiry Form
    Needle valves with UNF Tube Od 3000 6000 1/4" od up to 2" od UNF Threads with Nut + Ferrule Enquiry Form
    Needle valves with Tube to Thread End 3000 6000 6 mm upto 42 mm od Metric to Bspp threads Enquiry Form
    Needle valves with Flanges 3000 6000 1/4" NB up to 5 " NB SAE Flange/ ERW Flange Enquiry Form
    Needle valves with QRC End 3000 6000 1/4" up to 2" BSPP/BSPT/NPT/UNF Enquiry Form

    high pressure needle valves, weld type needle valve socket
    High Pressure Needle Valve
    Materials
    • VALVE BODY - STEEL -Phosphatised / Yellow Chromatize / trivalent Blue Zinc
    • VALVE BODY - STAINLESS STEEL -304 / 316
    • VALVE BALL - SS 321 / 304 - On request - SS 316 ( At Extra Cost )
    • SEALING - BALL SEAT WITH PTFE
    • SEALING - WITH O RING -NBR - ( Viton - O ring - On Request at Extra Cost only)
    • Handle - made out of Zinc Casting
    • Optional - M.S. -Powder coating on request only
    • All other Parts are trivalent Zinc with Blue passivation


    NEEDLE VALVES - Socket Weld type
  • Welding always Preferable to the piping systems to join tubes with valves where the end user has to avoid any leakage problem of fluids or gases at High Pressure.
  • Needle valves with Socket weld type connection are used for welding to tube end with valves in the Oil & gas industry to lower the risk of High pressure & lower rsk of leakage of viscous gases from the connections.
  • Needle valves with Socket weld type having Sqaure body Shape & socket hex adaptors screwed on both side of Body.

  • Seamless Tubes of the same Size of Socket has to be weld at both end of the Needle valve Socket weld type:

    Needle Valves with Socket Weld type W.P. -BAR SERIES SIZES FOR THREADS
    MOC OF BALL VALVE CLICK to Submit
    1/4" NB up to 5 " NB 200 3000 1/4 " NB to 5 " NB STEEL / STAINLESS STEEL Enquiry Form
    1/4" NB up to 3 " NB 400 6000 1/4 " NB to 3 " NB STEEL / STAINLESS STEEL Enquiry Form

    Materials
    • Valve Body - Steel Phosphatised / Yellow chromatize / trivalent Zinc Blue Passivation
    • Valve Body - STAINLESS STEEL -304 / 316
    • Valve Spindle - Steel, Stainless Steel 304 / 316
    • SEALING - Copper washer sealing / Metal sealing
    • SEALING - WITH O RING -NBR - ( Viton - O ring - On Request at Extra Cost only)
    • Handle - made out of Steel or Stainless Steel
    • W.P. = Low Pressure = 200 bar & High Pressure up to 400 bar
    • Optional - M.S. - Powder coating on request only
    • All other Parts are trivalent Zinc with Blue passivation

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    VE-LOCK® Product Warranty
    All VE-LOCK® Brand Make Products Stands for 12 Months Warranty of any defects in material or improper workmanship.The Warranty Stands for Replacements of determined Defective parts only.