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  • 100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability
  • Replaceable Acetal seat and straight through porting for bidirectional, high capacity flow and easy roddable cleaning
  • Blow-out proof stem provides a secondary stem seal in the full open position
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400/500 Series Needle Valves - ZnNi

1/4" National Pipe Thread (NPT), Female x Female, Steel, Soft Seat, 0.187" Orifice Needle Valve
500 Series Standard Needle Valves with Soft Seat 1/4 in. Connection Size Standard Needle Valve with Soft Seat (502-FFS)

1/4" National Pipe Thread (NPT), Female x Female, 316 Stainless Steel, Soft Seat, 0.187" Orifice Needle Valve
500 Series Standard Needle Valves with Soft Seat 1/4 in. Connection Size Standard Needle Valve with Soft Seat (502-FFS)

1/4" National Pipe Thread (NPT), Female x Female, 316 Stainless Steel, Panel Mount, Soft Seat, 0.187" Orifice Needle Valve
400/500 Series Needle Valves - ZnNi

1/4" National Pipe Thread (NPT), Male x Female, Steel, Soft Seat, 0.187" Orifice Needle Valve
400/500 Series Needle Valves - ZnNi

1/4" National Pipe Thread (NPT), Male x Female, Steel, Soft Seat, 0.187" Orifice Needle Valve with Ethylene Propylene Diene Monomer (EPDM) O-Ring and Panel Mount
Description N/A
  • 100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and reliability
  • Replaceable Acetal seat and straight through porting for bidirectional, high capacity flow and easy roddable cleaning
  • Blow-out proof stem provides a secondary stem seal in the full open position
Type N/A Needle Valve
Series N/A 500
Connection Size N/A 1/4 in
Valve Type N/A Female-Female N/A Female-Female N/A Female-Female N/A Male-Female N/A Male-Female
Valve Material N/A Steel N/A Stainless Steel N/A Stainless Steel N/A Steel N/A Steel
Material N/A Zinc-Nickel Plated Steel N/A Electropolished 316 Stainless Steel N/A Electropolished 316 Stainless Steel N/A Zinc-Nickel Plated Steel N/A Zinc-Nickel Plated Steel
Stem Seal and Type N/A All 316 Stainless Steel stems with Fluorocarbon (FKM) o-ring and Polytetrafluoroethylene (PTFE) back-up ring below the threads, Polytetrafluoroethylene (PTFE) packing optional for 1/4", 3/8" & 1/2" NPT only
Pressure Ratings at 200 Degree Fahrenheit (ºF) Temperature N/A 6,000 psi
Weight N/A 1.3 lb
Orifice Size N/A 0.187 in
Cv Coefficient N/A 0.76
Seat N/A Soft Seat
Packings1 N/A
O-Rings Material2 N/A N/A N/A N/A N/A Ethylene Propylene Diene Monomer (EPDM)
Panel Mountings N/A N/A N/A Panel Mount (2 Nuts) N/A N/A Panel Mount (2 Nuts)
Handles N/A
Warranty N/A 3 y
Connection Type N/A National Pipe Thread (NPT)
Additional Options N/A
  • Soft Seats
    • PEEK (PK1)
    • PCTFE (KF1 )
  • Stem Tips
    • Non-rotating (316 stainless) (T1 )
  • O-Rings
    • EPDM (EM1)
    • FFKM (Perfluoroelastomer 3018 or equivalent) (KZ1)
    • NBR (NB1)
  • Handles
    • 1-3/8" Phenolic (HL4)
    • 1-3/4" Phenolic (HL5 )
    • 2-3/8" Phenolic (HL9) (For 3/4" NPT to 1-1/2" NPT only.)
Prop 65 Warnings N/A
WARNING: This product can expose you to chemicals including Lead and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
Limitations Which Apply Are N/A These units must be operated within the catalogued environmental and application parameters. Determination of failure will be made by NOSHOK, Inc.'s equipment and personnel or a certified test facility specializing in this type of evaluation.

In keeping with and for purposes of product and/or manufacturing process improvements, NOSHOK, Inc. reserves the right to make design changes without prior notice.
Additional Information N/A
  • FKM o-ring seal and PTFE back-up ring below the stem threads to protect from corrosion and galling; PTFE packing optional (certain NPT sizes only)
  • All stem threads are rolled for strength and ease of operation
  • One-piece bonnet with a metal-to-metal seal to the valve body below the bonnet threads
  • Slotted spring pin to prevent accidental loosening
  • Vinyl dust cap for bonnet and stem (non-packing)
Installed Options and Accessories N/A
  • Soft Seats
    • PEEK (PK1)
    • PCTFE (KF1)
  • Packing
    • PTFE (P1)
  • Stem Tips
    • Non-rotating (316 Stainless Steel) (T1)
  • O-Rings (Other o-ring materials available on request)
    • EPDM (EM1)
    • FFKM (Perfluoroelastomer) 3018 or equivalent (KZ1)
    • NBR (NB1)
  • Panel Mount
    • 1 nut (PM1)
    • 2 nuts (PM2)
  • Handles
    • 1-3/8" Phenolic Handle (HL4)
    • 1-3/4" Phenolic Handle (HL5)
  • Cleaning For Oxygen Service (Stainless Steel Only)
Assembly Options N/A NOSHOK offers multiple assembly options to meet your specific system requirements. Consult factory to discuss your customized solution.
Note N/A Please note that the standard o-ring in all the NOSHOK valves is FKM and the standard handles are "T" handles (HL2).

The handle material will always match the material of the valve, unless otherwise specified. For example, the "T" handle (HL2) on the 504-FFC will be steel. When only the standard configuration is needed, no additional designations are necessary. Please consult the factory for special application requests.

All NOSHOK valve products conform to the MSS SP-99 instrument valves standards, and valves supplied with packing also conform to MSS SP-132 compression packing systems for instrument valves standard.
  • 1 For 1/4", 3/8" and 1/2" NPT only. If a packing option is chosen, maximum pressure rating is 6,000 psi. Refer to the "Pressure vs Temperature: Packing Style with Compatible Fluid" chart.
  • 2 Other o-ring materials available on request.

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