Diaphragm valve FP-450-66

hydraulically-operatedfloatpilot-operated

Overview
The FP-450-66 is a pilot-operated, hydraulically controlled water level control valve engineered for automatic filling of fire protection water reservoirs. It integrates a bi-level vertical float that sends an on/off hydraulic command to a diaphragm-actuated control valve. The valve opens at a preset low level and closes at a preset high level, ensuring quiet operation, long service life and minimal energy demand.

Features & Benefits
Safety and reliability

• Main valve with no mechanical moving parts in the flow path
• Proven Fail Open design for fail-safe operation
• Single-piece elastomeric diaphragm seal (VRSD technology)
• Obstacle-free, uninterrupted flow path reduces clogging risk
• Non-modulating On/Off operation reduces wear and extends valve life

High performance

• Quiet and smooth actuation suitable for building and fire systems
• Low headloss design for improved performance at reduced supply pressure
• Very low opening and closing pressure requirements

Specifically designed for fire protection

• Compact, space-saving dimensions for tank-room installations
• Operation optimized for fire protection reservoir filling cycles

Quick and easy maintenance

• In-line serviceable design for minimal system downtime
• Fast and simple cover removal for inspection and repairs

Applications

• Automatic filling of fire protection water reservoirs
• Integration in fire protection systems and building services

Technical specifications

• Model: FP-450-66
• Series: 400E Series
• Function: Water level control valve for automatic reservoir filling
• Float type: Bi-level vertical float (on/off control)
• Actuation: Pilot-operated, hydraulically controlled, diaphragm-actuated control valve
• Operation mode: Non-modulating On/Off (Fail Open)
• Valve behavior: Opens at pre-set low level; closes at pre-set high level
• Diaphragm: Single-piece elastomeric diaphragm (VRSD technology)
• Flow characteristics: Obstacle-free flow path; low headloss design
• Performance: Very low opening & closing pressure requirements; quiet, smooth operation
• Maintenance: In-line serviceable; fast and easy cover removal
• Primary applications: Fire protection water reservoirs and related fire systems
• Suitable segments: Fire Protection; Buildings & Construction
• Internal product reference: 488341