Deltrol

Pneu-Trol Check Valves

• 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)
  •  Viton: -15° to +400° F
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

Part Number
Material
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NPT Size
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Crack Pressure PSI
C10B
Brass
1/8”
1 to 2.5
CP10B
Brass
1/8”
1 to 2.5
C20B
Brass
1/4"
1 to 2.5
CP20B
Brass
1/4"
1 to 2.5
C25B
Brass
3/8"
1 to 2.5
CP25B
Brass
3/8"
1 to 2.5
C30B
Brass
1/2"
1 to 2.5
CP30B
Brass
1/2"
1 to 2.5
C35B
Brass
3/4"
1 to 2.5
C10S
Carbon Steel
1/8"
1 to 2.5
C20S
Carbon Steel
1/4"
1 to 2.5
C25S
Carbon Steel
3/8"
1 to 2.5
C30S
Carbon Steel
1/2"
1 to 2.5
C35S
Carbon Steel
3/4"
1 to 2.5
C10SS
Stainless Steel
1/8”
1 to 2.5
CP10SS
Stainless Steel
1/8”
1 to 2.5
C20SS
Stainless Steel
1/4"
1 to 2.5
CP20SS
Stainless Steel
1/4"
1 to 2.5
C25SS
Stainless Steel
3/8"
1 to 2.5
C30SS
Stainless Steel
1/2"
1 to 2.5

FP = POPPET FLOW CONTROL CP = POPPET CHECK K = KNOB *Soft seat check valves if left seated for a period of time, will have the rubber adhere to the metal it is in contact with. This results in an initial high crack point due to sticking. The degree depends on many things (time seated, pressure, etc.).