Petro Parda Co. Enginering, supply and construction of oil, gas & waste water treatment
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RTFE ball moves freely on the spacer where lining has been done with teflon materials and he ball stops in double sided flange passage way. Pressure of the material or the counter flow moves the ball upstream stopping the flow.
The spacer of the downstream is in the developing there is a free flow.
Places of use and function
– Prevent harms done on the pump motor by counter flow.
– Prevent harms done on the pump impeller by the counter flow.
– Interception when the back-head is high. 
