BTL / BFL
Cast Iron ; Ductile Iron ; Bronze ; Stainless Steel
Thread 1½'' to 2'' ; Flange 1½'' to 56''
0.3-4 kgf/cm2 ; 2-8 kgf/cm2 ; 5-13kgf/cm2
NBR ; Viton
Model BTL / BFL, Pilot Control Pressure Relief Valve serves as a safety device to protect pipelines from surge or over pressures. A Pressure Relief Valve maintains safe water supply pressure inside the pipe to prevent sudden increase of pressure that would damage the system by releasing exceeded pressure.

Step 1: Open upstream valve.
Step 2: Loose the lock nut of the controller adjustment screw and turn adjusting screw counterclockwise until lowest outlet pressure.
Step 3: Pressure gauge on the valve indicate inlet pressure.
Step 4: Adjust the controller adjustment screw clockwise to the pressure required.
Step 5: Fasten up lock nut.
Our Piston Type Pressure Relief Valves are engineered to provide precise and reliable overpressure protection for industrial, municipal, and hydraulic systems.
The customer in Pakistan was looking for a high-flow pressure relief valve suitable for installation at the Karachi Pumping Station. They selected the Z-Tide BFL Piston Type Pressure Relief Valve with conduit-free design.
The 8'' Cast Iron Flange-End Piston Type Pressure Relief Valve provides high flow capacity and reliable automatic pressure release to protect pipelines from sudden pressure surges, fully meeting the customer's needs and expectations. The no external piping design allows for flexible installation, minimizes leakage risks, and ensures long-term stability and safety in water supply operations.
Yes. Piston-type relief valves are ideal for high-flow, high-pressure systems, offering stable control, fast response, and reliable protection against pressure surges.
The conduit-free design removes external tubing, providing:
It ensures safe, clean, and long-lasting operation.
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