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Bermad - Model FP 400Y 4DC - Pneumatically Pressure Controlled, On-Off Deluge Valve

Deeco - Bermad - FP-400Y-4DC - Product Image.
Brand: Bermad
Category: Control Valves, Fire Protection Series
Size Range:



40-400mm - Flanged
40-200mm - Grooved

Engineering Data:

Bermad - Model FP400Y - Engineering Data

Product Description

The BERMAD model 400Y-4DC is an elastomeric hydraulic, line pressure-operated, deluge valve, designed specifically for advanced fire protection systems and the latest industry standards. The 400Y-4DC is activated by a relay valve, held closed by pneumatic pressure. Opening and closing of the deluge valve can be controlled remotely. An integrated pressure control pilot valve ensures a stable and precise pre-set downstream water pressure. The BERMAD 400Y-4DC is suitable for open-nozzle systems with a high-pressure water supply. The pneumatic control makes it ideal for use in freezing environments and corrosive media. The optional valve position indicator can include a limit switch suitable for Fire & Gas monitoring systems.

Features and Benefits

  • Safety and reliability
    • Time-proven, simple, fail-safe actuation
    • Single-piece, rugged, elastomeric diaphragm seal - VRSD technology
    • An Obstacle-free, uninterrupted flow path
    • No mechanical moving parts
    • Shuts off on remote command
    • Ensures precise, stable downstream water pressure
    • Valve position limit switches (optional)
  • High performance
    • Very high flow efficiency
    • Straight-through-flow Y-type body
    • Approved for PN25 (365 psi)
  • Designed for fire protection
    • Face-to-face length standardized to ISO 5752, EN 558-1
    • Suitable for corrosive fluids and freezing temperatures: pneumatic relay valve
    • Designed to meet the requirements of the industry standards
  • Quick and easy maintenance
    • In-line serviceable
    • Fast and easy cover removal
    • Swivel-mounted drain valves*

* For 3” valves and larger


Bermad - FP400Y - Approvals

Additional Options

  • Valve position limit switches
  • Alarm pressure switch
  • Air maintenance device
  • Sea water compatibility
  • Drain valve/s inlet/outlet
  • For “automatic activation” select BERMAD local or remote reset model

Typical Applications

  • Remote control water spray systems
  • Foam applications
  • Corrosive water supplies
  • High-pressure water supply
  • Freezing conditions

Technical Data


Deeco - Bermad - FP-400Y-4DC - Operation

The BERMAD model 400Y-4DC is held closed by water pressure in the control chamber [1]. Upon release of pressure from the control chamber, the valve opens. Under NORMAL conditions, water pressure is supplied to the control chamber via the priming line [2] strainer [3] and restriction orifice [5], it is then trapped in the control chamber by a check valve [4], manual emergency release [6], and a relay valve (URV) [7] that is held closed by pneumatic pressure in the dry pilot line [E]. The water pressure trapped in the main valve control chamber holds the diaphragm against the valve seat, sealing it drip-tight and keeping the system pipes dry. Under FIRE conditions, water pressure is released from the control chamber, either with the manual emergency release or by the URV opening in response to a decrease in pneumatic pilot-line pressure. This opens the 400Y-4DC deluge valve, allowing water to flow into the system piping and to the alarm device [9]. The pressure-reducing pilot valve [8] senses changes in outlet pressure and, modulates the main valve to maintain the set downstream pressure. When outlet pressure changes, the pressure-reducing pilot opens or closes in response. This regulates the pressure in the main valve’s control chamber, thus modulating the position of the diaphragm seal disk to maintain the set downstream pressure.

System P&ID

Deeco - Bermad - FP-400Y-4DC - System PID


1 BERMAD 400Y Deluge Valve

2 Priming Ball Valve

3 Priming Strainer

4 Check valve

5 Restriction Orifice

6 Manual Emergency Release

7 URV-2 Hydraulic Relay Valve

8 Pressure Control Pilot Valve

Optional System Items

PI Pressure Gauge

I Valve Position Indicator

DC Drip Check

AV 3-Way Alarm Test Valve

DV Drain Valve

PS Pressure Switch

ZS Limit Switch Assembly

W Water Motor Alarm

AMD Air Maintenance Device

Main Valve

Available Sizes and Connection

  • 40-400mm - Flanged
  • 40-200mm - Grooved

Pressure Rating

  • ANSI#150 - 16 bar / 235 psi
  • ANSI#300 - 1½” to 10” 25 bar / 365 psi
    12” to 16” 20 bar / 300 psi
  • Grooved - 25 bar / 365 psi
  • Threaded – 25 bar / 365 psi
  • Setting range: 4 - 12 bar (60 - 175 psi)

for other setting ranges consult Deeco.


  • HTNR - Fabric Reinforced High-Temperature Compound

System Installation

A typical installation of the BERMAD model 400Y-4DC features actuation by way of a fall in pneumatic pressure to the control chamber of the 2-Way Universal Relay Valve. When open, and fitted with a limit switch the valve can send a feedback signal to a remote valve position monitoring system. A pressure-reducing pilot valve integrated into the control trim ensures a precise and stable pre-set downstream water pressure

Deeco - Bermad - FP-400Y-4DC - System Installation

Deeco - Bermad - FP-400Y-4DC - System Installation

Technical Specifications

Suggested Specifications

The deluge valve shall be UL listed, 25 bar/365 psi rated, elastomeric-type, with a straight-through, Y-type body. The valve shall have an unobstructed flow path without a stem guide or supporting ribs. Valve actuation shall be accomplished by a single-piece, rolling diaphragm bonded with a rugged radial seal disk. The diaphragm assembly shall be the only moving part. The deluge valve shall include a relay pilot valve, a pressure-reducing pilot valve, a Y-type strainer, a ball drain valve, an automatic drip-check with manual override, 4-inch pressure gauges, and a manual emergency release housed in a stainless steel box. The valve drain socket shall be flanged and have a 360-degree swivel. The valve shall be equipped with two limit switches. Removing the valve cover for inspection and maintenance shall not require removing the control trim. The deluge valve and its entire control trim shall be supplied pre-assembled and hydraulically tested by a factory certified to ISO 9000 and 9001 standards

Dimensions and Weights

Deeco - Bermad - FP-400Y-4DC - Technical Specifications
Deeco - Bermad - FP-400Y-4DC - Dimensions and Weights

(1) Refers to the length dimensions for Raised Face ANSI #150, ISO 16 Flanged, Threaded and Grooved valves

(2) Refers to the length dimensions for Raised Face ANSI #300 and ISO 25 Flanged valves

(3) Flow coefficients apply to a fully opened valve

(4) Leq (Equivalent Pipe Length) refers to turbulent flow in new steel pipe schedule 40 for a fully opened valve, values given for general consideration only

(5) IMPORTANT: Dimensions for the trim envelope or extents may vary with specific component positioning and where needed can be tailored to suit specific requirements - allow a tolerance of at least ±10%.

Due to the wide range of options and criteria for correct model selection, pricing and configuration are available on application only.

Please contact us for more information.

Fire - Ordering Guide 1
Fire - Ordering Guide 2
Fire - Ordering Guide 3
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