• Optional Bubble-Tight Check Valve Available
Flow Control
A spring biased ball or optional poppet check provides full flow in one direction; a stainless steel, tapered needle provides a wide range of adjustment of flow in the controlled direction. A locknut prevents unwanted changes in adjustment. A tamperproof adjustment key is standard; a knurled knob is optional at slight extra cost.
Needle
A wide range of flow adjustment is possible because of the fine thread, tapered needle. Unwanted changes in adjustment are prevented by a locknut. A tamperproof adjustment key is standard; a knurled knob is available at slight extra cost.
Check
A slight pressure differential fully opens or closes the ball or poppet check valve. This valve is available with either ball check or bubble-tight poppet check.
Maximum Operating Pressure (Non-Shock Service)
- Brass—2,000 PSI
- Carbon Steel—5,000 PSI
- Stainless Steel—5,000 PSI
Operating Temperature Range (O-Ring Packing)
Threads
- NPTF Standard, 1/8”, 1/4”, 3/8”, 1/2”, and 3/4”. SAE Threads on special order.
Materials
- Housing, Plug, Body—Hexagon Brass, Hexagon Carbon Steel, Hexagon 303 Stainless Steel
- Needle—416 Stainless Steel on Steel and Stainless Steel Valves
- Back-up Washer—Teflon
- Knob—Aluminum
- Tamperproof Key—Cadmium Plated
Steel
- Ball—Stainless Steel
- Retainer—Stainless Steel
- Poppet—Brass or Stainless Steel with
- Viton (Standard) O-Ring