This brass check valve controls unidirectional flow in feed-water, dump-line, process, monitoring, and sampling systems. Its self-centering seal, soft-seat O-ring, and metal backup seal are designed for zero-leakage performance. Used on some portable extractors to prevent heater bypass into pump, preventing secondary pump damage. 

Specifications: 1/4 in. MNPT × 1/4 in. MNPT connections. Maximum pressure: 1,500 PSI. Temperature range: -40°F to 300°F. Standard cracking pressure: 1/3 PSI.