Noshok
500 Series Standard, Soft Seat Needle Valves

Key Features

  • 100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance 
    and reliability
  • 6,000 psi pressure rating @ 200 °F
  • Replaceable Delrin® 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
  • 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 stems are 316 stainless steel
  • 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)
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SPECIFICATIONS
MaterialsZinc-nickel plated steel, electropolished
316 stainless steel
Connections1/4", 3/8", 1/2", 3/4", 1", 1-1/4" & 1-1/2" NPT 
Male-female & Female-female configurations 
Pressure ratings6,000 psi @ 200 °F
Orifice size1/4" - 1/2" NPT: 0.187"
3/4" - 1-1/2" NPT: 0.438"
Flow coefficient1/4" - 1/2" NPT: C0.76
3/4" - 1-1/2" NPT: CV 4.0
Steam seal & typeAll 316 stainless steel stems with FKM o-ring and PTFE back-up ring below the threads, PTFE packing optional for 1/4", 3/8" & 1/2" NPT only
OptionsPanel mountings, o-ring materials, handles, packings, regulating stem and stem tips

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