Product Description:
Check valves are mechanical valves that permit gases and
liquids to flow in only one direction, preventing process flow
from reversing. They are classified as one-way directional
valves. Fluid flow in the desired direction opens the valve,
while backflow closes the valve. The mechanics of check valve
operation are not complicated. Most check valves contain a ball
that sits freely above the seat, which has only one through
hole. The ball has a slightly larger diameter than that of the
through hole. When the pressure behind the seat exceeds that
above the ball, liquid is allowed to flow through the valve.
Once the pressure above the ball exceeds the pressure below the
seat, the ball returns to rest in the seat, forming a seal that
prevents backflow. We manufacture check valves in conformity
with ASME B16.34 standards. All valves are tested according to
API 589 requirements. The marking is as per MSS SP-25
standards.