Water pressure relief valve 430

for water systemsfor pipelinesfor hydraulic systems

Product Overview
Hydraulically operated pressure relief/sustaining control valve capable of two distinct functions: installed in-line to sustain a minimum preset upstream (back) pressure regardless of fluctuating flow or downstream pressure; or installed as a branched-from-line circulation valve to relieve excessive line pressure above a preset maximum.

Features & Benefits

• Line-pressure driven – independent operation
• High-performance control trim
  • High stability and accuracy across a wide flow range
  • Drip-tight sealing
• Flexible design - easy addition of features
• Advanced globe hydro-efficient design
  • Unobstructed flow path
  • Single moving part
  • Non-turbulent flow
  • High flow capacity
• Fully supported & balanced diaphragm
  • Excellent low-flow regulation
  • Progressive valve closing control
  • Prevents diaphragm distortion
• In-line serviceable
  • Easy maintenance
  • Minimal downtime

Typical Applications

• Pumping stations - pump circulation valve
• Pumping stations - sustains pump discharge pressure, preventing pump overload and cavitation damage caused by excessive demand
• Water delivery systems - maintaining upstream pressure during pressure drop
• Water delivery systems - prioritizing upstream over downstream demand

Technical Specifications

• Model: 430
• Series: 400 Series
• Product type: Pressure relief / sustaining valve
• Operation: Hydraulically operated, line-pressure driven control valve
• Design highlights: Advanced globe hydro-efficient design; fully supported & balanced diaphragm; in-line serviceable
• Key performance features: high stability & accuracy, drip-tight sealing, unobstructed flow path, single moving part, non-turbulent flow, high flow capacity, excellent low-flow regulation, progressive closing control
• Typical installations: pump circulation, pump discharge pressure sustainment, line pressure relief, upstream pressure maintenance
• Available documentation: product pages (metric & imperial), IOM (Installation & Maintenance), engineering data, spare parts list, ordering guide (PDFs)
• Segments: Buildings & Construction; Waterworks