The BERMAD model 42T is an elastomeric, line pressure driven pilot operated pressure control valve. Designed specifically for advanced fire protection systems and the latest industry standards. The 42T reduces high upstream pressure to a precise, preset, stable downstream pressure. Due to its exceptional reliability and low head loss the 42T is ideal for control of fire pump discharge. It is also well-suited to prevent over-pressure in sprinklers, hose stations, and other discharge devices. As an option the 42T can be fitted with a valve position indicator that can include a limit switch suitable for Fire & Gas monitoring systems.
The BERMAD Model 42T pressure control valve, reduces water pressure automatically and accurately from a high inlet pressure to a lower, preset outlet pressure. The outlet set pressure can be adjusted by way of the pilot adjusting screw . The valve operates under both flow and static conditions. The pressure-reducing pilot valve  senses changes in outlet pressure  and modulates the control valve to maintain the preset outlet pressure. When outlet pressure rises above the preset pressure , the pilot valve throttles, enabling pressure to accumulate in the control chamber , this causes the control valve to close further and reduce outlet pressure. When outlet pressure falls, the pilot valve opens wider, releasing pressure from the control chamber. This causes the control valve to open wider and increase outlet pressure. An integral restrictor  controls the valve’s closing speed. For valve sizes 12, 14 & 16” an adjustable needle valve is provided.
1 BERMAD 400Y Water Control Valve
2 Y Strainer
3 Restriction Orifice
4 Pressure Reducing Pilot Valve
ZS Limit Switch Assembly
SRV BERMAD 43T Pressure Relief Valve
I Visual Indicator
See also Factory Fitted Options under the Valve
Code Designations on the last page
A typical installation of the BERMAD model 42T features a pilot valve for the automatic stable and accurate reduction of water pressure from a high upstream value to a preset lower downstream value, regardless of fluctuating upstream pressure or flow. A unique actuator design ensures quick and smooth valve action. Installed singly, the 42T provides a standard pressure-reducing system. Installed in parallel, two 42T valves provide high flow rates, redundancy, and zero downtime for maintenance. Installed in series, two 42T valves can provide a two-stage, high reduction in pressure and/or added protection to a reduced-pressure zone.
To comply with the requirements outlined in the FM, UL and NFPA standards, a pressure relief valve of at least ½” is to be installed on the downstream side of any pressure reducing valve. For sizing the required relief valve for optimal performance see the BERMAD recommendation in the table below.
The pressure reducing valve shall maintain a constant, preset, downstream pressure regardless of fluctuating upstream pressure or flow.
The valve shall be UL listed and FM approved, 25 bar / 365 psi rated, line pressure driven and pilot operated. It shall be of the elastomeric-type with a straight-through Y-type body.
The valve shall have an unobstructed flow path with no stem guide or supporting ribs.
Valve actuation shall be accomplished by a single-piece, rolling diaphragm bonded with a rugged radial seal disc.
The diaphragm assembly shall be the only moving part.
Maintenance, inspection or service shall be carried out in-line and without removal of the control trim. The valve and it’s entire control trim shall be supplied pre-assembled and hydraulically tested by a factory certified to ISO 9000 and 9001 standards.
For FM Approval: 2 - 12 bar (30 - 175 psi). For UL listing: 4 - 12 bar (60 - 175 psi)
Also Available: 2 - 16 bar (30 - 235 psi) or 8.6 - 25 bar (125 - 365 psi) * the 1½, 2 & 2½” valves are UL-Listed for 28 bar/400 psi, and FM Approved for 25 bar/365 psi
Please specify the requested valve in the following sequence: (for more options, please contact us.)