How to Commission and Calibrate a Two Stage Pressure Reducing Station 720-PD, 720

This video shows the commissioning and calibration of the BERMAD 720 pressure reducing control valve installed in-line with a Bermad 720-PD constant ratio pressure reducing valve. Both valves are shown installed in a pressure reducing station equipped with pressure gauges, upstream and downstream isolation valves and an in-line strainer. Use this configuration to enable the sharing of the load of a high differential pressure reduction between two valves. The primary pressure reduction of the station is achieved by a constant ratio Proportional Diaphragm valve. The secondary reduction by a pilot operated reducing valve to accurately reduce the pressure to the exact requirement. This dual reduction system offers higher reliability and safety, longer service intervals and a quieter operation

Proportional Pressure Reducing Valve BC-720-PD-P

Hydraulically operated, diaphragm actuated pressure reducing control valve that reduces a high upstream pressure to a lower downstream pressure at a fixed ratio.

BERMAD 700 series valves are hydraulic, oblique pattern, globe valves with double chamber unitized actuator, that can be disassembled from the body as a separate integral unit. The valves hydrodynamic body is designed for unobstructed flow path and provides excellent and highly effective modulation capacity for high differential pressure applications.

  • High Quality Construction Materials – Reliable, resilient and long lasting operation
  • Robust Design – Suitable for constant, intense operation Iֺֺn-Line Serviceable – Quick and easy maintenance and service
  • Line Pressure Driven – Independent operation, no external power needed
  • Unitized Actuator Assembly – Minimal downtime
  • Hydrodynamic Body with Unobstructed Flow Path – Minimal noise and cavitation damage
  • Protected Diaphragm – Minimizes chance of damage caused by debris in the pipeline
  • Double Chamber Actuator – Rapid response to system changes with no hammer effect
  • Adjustable Excessive Pressure Pilots – Easy field pressure setting and calibration
  • “Steps down” pressure when pressure reduction must be done in two or more stages
  • Decreases the potential for high noise levels and cavitation damage caused by high reduction ratios
  • Reduces the differential pressure load across level control or pressure relief valves by splitting that load between two valves instead of one

Two-Stage Pressure Reducing Station, featuring BERMAD BC-720-PD-P valves to reduce the incoming pressure by a fixed ratio and share the load with the BERMAD BC-720-P PRV, a redundant, parallel branch to minimize the possibility of total water shut-off and a low flow bypass branch for low demand operation. For information on the other BERMAD products in this system please see the product data sheet for the following components: BERMAD BC-720-P, BERMAD BC-73Q-P and BERMAD BC-70F-P.

English BC 700 Series Engineering
English BC-720-PD-P Product Page
English 700 & 800 Potable Water Ordering Guide