Series SJ800
PRPLJ028

SJ800 Differential Bypass Balancing Valve

A differential bypass balancing valve that automatically maintains a constant pressure differential across a circuit, ensuring stable flow distribution in heating and chilled-water systems.

SizeDN50 to DN300PressurePN16BodyGlobe / diaphragm hydraulic control valve
Overview

The SJ800 differential bypass balancing valve continuously regulates the pressure differential between supply and return lines, diverting surplus flow to keep the system in hydraulic balance as terminal demand varies. It protects pumps against dead-heading and prevents noise and energy waste in variable-flow HVAC and district heating circuits.

Technical Detail

Specifications

Product Code
SJ800
Size Range
DN50 to DN300
Pressure Rating
PN16
End Connections
Flanged
Body Material
Ductile iron, epoxy coated
Body Style
Globe / diaphragm hydraulic control valve
Operation
Self-actuated (pilot controlled)
Applications
HVAC, district heating and chilled-water balancing
Design Standard
GB/T, manufacturer standard
At a Glance

Key Features

  • Automatic differential pressure control
  • Protects pumps from dead-head operation
  • Reduces flow noise and energy loss
  • Field-adjustable setpoint
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