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Fire Protection

Bermad Model FP450 66 - Level Control Valve

The Model FP 450-66 Level Control Valve with Bi-Level Vertical Float is a hydraulically controlled, diaphragm actuated control valve that controls reservoir filling in response to a hydraulic on/off float pressure command. The Valve opens at pre-set low level and closes at a pre-set high level.


Features and Benefits

  • Line-pressure driven
    - Independent operation
  • Bi-Level Float
    - On/Off - non modulating
    - Extended service life
  • Rugged Reliability
    - Single-piece fully supported rolling diaphragm
    - Obstacle-free unobstructed flow path
    - Suited for use with low quality water
  • Hydraulically Restrained Actuation
    - Non-slam closing
    - Quiet and smooth operation
  • High Performance
    - High flow capacity
    - Low operating pressure
  • External Installation
    - Easy access to valve & float
    - Simple level setting
    - Less wear and tear
  • In-line Serviceable
    - Quick and easy maintenance
  • Flexible Design
    - Simple addition of factory supplied features

Major Additional Features

  • Pressure sustaining – 453-66
  • Electric float backup – 450-66-65
  • Flow control – 457-66-U


The Model FP 450-66 is a float controlled valve equipped with a 4-way, “last position”, bi-level float pilot assembly.

The float [1] slides along the rod [2]. When the float reaches either the adjustable high [3] or low [4] level stoppers, it either pulls the rod assembly down or pushes it up, switching the float pilot [5] position. When the float is between the adjustable stoppers, the main valve remains in its last position.

At high level, the float pilot applies pressure to the control chamber [6], powerfully shutting off the main valve. At low level, the float pilot vents the control chamber, powerfully opening the main valve. For 8” valves and larger, an accelerator [7] quickens valve response.

Engineer Specifications

The Level Control Valve shall hydraulically open at a pre-set low level, and close at a pre-set high level. Main Valve: The main valve shall be an elastomeric type globe (or angle) valve with a rolling-diaphragm. The valve shall have an unobstructed flow path, with no stem guide or supporting ribs. The body and cover construction material shall be ductile iron. All external bolts and nuts shall be of stainless steel 316. All valve components shall be accessible and serviceable without removing the valve from the pipeline. Actuation: Valve actuation shall be accomplished by a fully peripherally supported, single piece, balanced rolling-diaphragm, vulcanized with a rugged radial seal disk. The diaphragm assembly shall be the only moving part.

The assembled valve shall be hydraulically tested. Quality Assurance: The valve manufacturer shall be certified according to the ISO 9000 and 9001 Quality Assurance Standard.

Typical Applications

Infrastructure Installation

Rooftop reservoir level control is attained by electric control of the basement pumps according to reservoir level. As overflow of a rooftop reservoir can cause costly damage, hydraulic backup protection is recommended. The Model FP 450-66 is suited to this function. When open, it presents minimal interference, but when needed, it shuts off securely. To ensure supply pressure to upper floor consumers or the fire protection system, install the Model FP 420 or 42T Pressure Control Valve upstream from the Model FP 450-66.

Basement Reservoirs

Basement reservoir design requires consideration of specific issues:

  • Supply cut-off is unacceptable.
  • Reservoir overflow might damage expensive equipment.
  • Noise level and duration should be limited.
  • Municipal supply pressure might be low.

The Model FP 450-66, as part of a Reservoir Fill-Up system, fulfills these requirements and more.

Technical Data

Connection Standard

  • Flanged: ANSI B16.42 (Ductile Iron), B16.5 (Steel & Stainless Steel), B16.24 (Bronze) or ISO PN16
  • Grooved: ANSI/AWWA C606 for 2, 3, 4, 6 & 8”

Water Temperature

  • 0.5 – 50°C (33 – 122°F)

Available Sizes

  • Globe: 1½, 2, 2½, 3, 4, 6, 8, 10 & 12”
  • Angle: 2, 3 & 4”

Pressure Rating*

  • Max. working pressure: 250 psi (17 bar)

Manufacturers Standard Materials

Main valve body and cover

  • Ductile Iron ASTM A-536

Main valve internals

  • Stainless Steel 304 & Cast Iron

Control Trim System

  • Brass control components/accessories
  • Stainless Steel 316 tubing & fittings


  • Nylon fabric reinforced polyisoprene NR


  • Electrostatic Powder Coating Poleyester, Red (RAL 3002)

Optional Materials

Main valve body

  • Carbon Steel ASTM A-216 WCB
  • Stainless Steel 316
  • Ni-Al-Bronze ASTM B-148

Control Trim

  • Stainless Steel 316
  • Monel® and Ni-Al-Bronze
  • Hastalloy C-276


  • NBR
  • EPDM


  • High Build Epoxy Fusion-Bonded with UV Protection, Anti-Corrosion
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2D CAD Drawing

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Engineering Data*
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2D CAD Drawing

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Engineering Data*
PDF - Download Icon
Engineering Data

2D CAD Drawing

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Engineering Data*
* Note:
For some products Manual and/or Engineering Data are available only upon request.

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Bermad Model FP450 66 - Level Control Valve

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