Cast Iron Butterfly Balancing Valve

Technical Requirement:
  1. Design & Manufacture: GB/T 12238 / Manufacturer standard
  2. Face-to-Face: GB/T 12221
  3. End Flanges: GB/T 17241.6 (PN16)
  4. Inspection & Test: GB/T 13927

Description

The Cast Iron Butterfly Balancing Valve is a flanged balancing valve that uses a butterfly disc for flow regulation, combined with pressure test points and a lockable handwheel indicator. Compared with globe-type balancing valves, it offers lower pressure loss and lighter weight, making it ideal for large-diameter mains and risers in HVAC systems.

Technical Specifications:
  • Pressure Class: PN16
  • Size Range: DN50 – DN600
  • Applicable Medium: Water, water-glycol mixtures
  • Operating Temperature: -10°C to 120°C
Main Parts and Materials:
Parts NameMaterials
BodyCast Iron HT200 / Ductile Iron QT450
DiscDuctile Iron (coated) / Stainless Steel
SeatEPDM
ShaftStainless Steel 2Cr13
Test PointsBrass
Key Product Features:
  1. Low Pressure Drop: Butterfly disc gives high flow capacity in large sizes.
  2. Measuring Ports: Integrated test points for on-site flow verification.
  3. Lockable Setting: Handwheel position can be locked to prevent tampering.
  4. Tight Shut-Off: Resilient seat doubles as an isolation valve.
  5. Compact & Light: Shorter and lighter than globe-pattern balancing valves of the same size.
Applications:

Ideal for Central Air Conditioning, Chiller Plant Headers, Heating Risers, and District Cooling. Specifically suited for balancing large pipe sizes where low head loss matters.

Additional information

Standard

GB