Product Overview
SS-4P4T Quarter-Turn Manual Shutoff Valve, 1/4 in. FNPT, 316 Stainless Steel, 3000 PSIG, FKM O-rings
Condition
Single unit available. Used — normal wear with scuffs and scratches. Valve action is smooth and threads check out fine. Obtained from a government research facility. Backed by our no-hassle guarantee.
Ships same business day from Idaho. Packed carefully.
Product Overview
Nupro SS-4P4T is a manual quarter-turn plug valve for liquid and gas lines requiring a compact, leak-tight shutoff at moderate pressures. One-piece 316 stainless steel body with a PTFE-coated 316 SS plug and fluorocarbon FKM O-rings. Nupro is a brand within the Swagelok family — this valve is functionally identical to its Swagelok-branded counterpart and fully cross-compatible.
Key Features
- Body material: 316 stainless steel, one-piece construction
- Connection: 1/4 in. Female NPT (FNPT) both ends
- Pressure rating: 3000 PSIG (206 bar)
- Temperature range: -10°F to 400°F (-23°C to 204°C)
- Orifice size: 0.172 in. (4.4 mm)
- Flow coefficient (Cv): 0.6
- Plug seal: PTFE-coated 316 SS plug with fluorocarbon FKM O-rings (standard)
- Operation: Quarter-turn manual, non-directional two-way shutoff
Applications
- Sampling systems and analytical instrumentation
- Laboratory and pilot plant gas manifolds
- Gas distribution panels and process lines
- R&D fluid systems requiring compact, reliable shutoff
Frequently Asked Questions
Are the connections NPT threads or Swagelok compression tube fittings?
These are 1/4 in. Female NPT (National Pipe Thread) connections — not Swagelok compression ends. Swagelok tube fittings require a separate adapter to connect to this valve.
Is this valve compatible with Swagelok components?
Yes. Nupro is part of the Swagelok product family. This valve is functionally identical to the Swagelok-branded SS-4P4T and is interchangeable in Swagelok systems that use NPT connections.
Are the standard FKM O-rings compatible with aggressive chemicals?
Standard O-rings are fluorocarbon FKM, suitable for most process gases and liquids. For aggressive media such as anhydrous ammonia or specific solvents, verify FKM compatibility against your fluid compatibility chart before use. Kalrez and Buna-N seal variants exist if required.
Does this valve support downstream venting or three-way flow?
No. This is a standard two-way shutoff valve — open or closed. It does not support a downstream vent port. If your application requires a vent path, a three-way plug valve is needed.
Nupro and Swagelok labeling reflects production era only — the specification and performance of SS-4P4T is unchanged between brands. Verify NPT thread compatibility with your existing piping before installation.
