Check-All Valve Material Temperature Ratings

Body Temperature Ratings

SS -- 316 Stainless Steel-320° F to 700° FTF -- Fluoropolymer (PTFE)-320°F to 400°F
BR -- Brass-320° F to 400° FPV -- PVC+32°F to 150°F
CS -- Carbon-20° F to 700° FA2 -- Alloy 20-320° F to 600° F
MO -- MONEL® Alloy-320° F to 500° FHC -- Alloy C-276-320° F to 1000° F
TI -- TITANIUM-75° F to 500° FHB -- Alloy B-320° F to 800° F

Internal material may differ from body materials. Material selection for specific application is the responsibility of the customer. Please contact for more information.

Seat Temperature Ratings

The temperature ranges given below are for ideal conditions and may vary with a specific application or service. Metal to metal seats and PTFE seats are not “bubble tight”. See Application Guidelines or consult the factory for further information.

Seat MaterialMaximum Pressure
(Room Temperature)
Temperature Range
AS -- AFLAS®1500 PSI+10°F to 400°F
BN -- Buna-N1500 PSI-40°F to 250°F
EP -- EPR/EPDM1500 PSI-65°F to 300°F
KZ -- KALREZ®1500 PSI 0°F to 525°F
MT -- Metal-to-Metalsame as bodysame as body
NE-- Neoprene1500 PSI-40°F to 250°F
TF-- Fluoropolymer (PTFE)
TF not available for plastic valves
1500 PSI-320°F to 500°F
VT -- VITON®1500 PSI-10°F to 400°F

Other o-ring compounds are available. Please contact for more information.

Spring Temperature Ratings

SS -- 316 Stainless Steel-320° F to 400° F
PH -- 17-7 PH® Stainless Steel-20° F to 400° F
HC -- Alloy C-276-320° F to 400° F
HB -- Alloy B-320° F to 400° F
Alloy 400 or MO -- MONEL®-320° F to 400° F
IX -- INCONEL® X-750-320° F to 700° F
TI -- TITANIUM BETA C-75° F to 550° F

Check-All Valve also offers FEP Encapsulated springs, which are springs, incased in heat shrinkable FEP tubing. The ends of the tubing are plugged with FEP and sealed. FEP Encapsulation may reduce flow capacity and the cracking pressure may vary. Some springs for .348 and .464 orifice diameters are not available with FEP Encapsulation. Consult the factory for a substituted spring. Temperature range for FEP Encapsulation material is -320° F to 400° F.