What valves are used in HVAC systems?

HVAC systems use butterfly valves (for isolation and throttling in main lines, DN50-DN600), ball valves (for zone isolation and equipment connection, DN15-DN100), control valves (for modulating flow control, 2-way and 3-way), check valves (for preventing backflow in pump discharge), and strainers (for protecting equipment from debris). PN16 and Class 150 are the most common ratings.

What is the difference between PN16 and Class 150 for HVAC valves?

PN16 is a metric pressure rating (16 bar = 232 PSI) commonly used in European and Asian specifications. Class 150 is an imperial rating (150 PSI = ~10 bar at room temperature) used in American specifications. For water and chilled water HVAC applications up to 60°C, both are suitable. PN16 valves are preferred for new projects following ISO/DIN standards.

What material is best for HVAC chilled water valves?

For chilled water (5-15°C), Cast Iron or Ductile Iron butterfly valves with EPDM liners provide excellent service life and cost-effectiveness. Ball valves in brass or SS316 are used for smaller sizes and zone control. For critical chilled water with glycol mixtures, SS316 valves offer superior corrosion resistance.

How do I size a butterfly valve for HVAC application?

Butterfly valve sizing is typically based on pipe size for on/off service. For throttling service, consider: 1) Full bore design for minimal pressure drop, 2) Characterized disc for better flow control, 3) Operator torque requirements, 4) Wafer or lug body style. Most HVAC applications use valves matched to pipe size with gear operators for sizes DN200 and above.

HVAC Valves for Commercial Buildings

Cost-effective butterfly valves, ball valves, and control valves for heating, ventilation, and air conditioning systems. PN16/Class 150 rated for water, chilled water, and condenser applications.

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HVAC Applications We Serve

Chilled Water Systems

Central air conditioning chilled water circulation. Butterfly valves for main isolation, ball valves for zone control. Cast iron with EPDM for corrosion resistance.

Condenser Water

Cooling tower condenser water circulation. High-density polyethylene or epoxy-coated valves for treatment chemical resistance.

Boiler Feedwater

Hot water and steam heating systems. Gate and globe valves for isolation, check valves for pump protection. Carbon steel for higher temperatures.

Air Handling Units

VAV (Variable Air Volume) and constant air volume systems. Control valves for duct pressure, butterfly valves for isolation.

Fan Coil Units

Individual room temperature control. Small ball valves and control valves for 2-pipe and 4-pipe systems. Brass and SS316 materials.

Make-up Water

Water makeup lines for cooling towers and boilers. Float valves, pressure reducing valves, and strainers.

HVAC Valve Products

Butterfly Valves

Wafer and lug type butterfly valves for main line isolation and throttling. PN16 rated, EPDM liner, ductile iron disc.

Sizes: DN50 to DN600
Pressure: PN16 (16 bar)
Body: Cast Iron, Ductile Iron
Disc: Ductile Iron, SS316
Liner: EPDM, NBR
Gear operator included

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Ball Valves

Full and reduced port ball valves for zone control and equipment isolation. Brass, SS316, and carbon steel body options.

Sizes: DN15 to DN100
Pressure: PN40 / Class 150-300
Body: Brass, SS316, WCB
Full or reduced port
Screwed or flanged ends
PTFE or metal seats

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Control Valves

2-way and 3-way control valves for modulating flow control. Pneumatic or electric actuators, characterized flow.

Sizes: DN15 to DN150
Characterized: Linear, EQ%, Quick Open
Actuator: Pneumatic, Electric
Body: Cast Iron, SS316
Positioner available
4-20mA or 0-10V signal

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Check Valves

Swing, dual plate, and silent check valves for pump protection and backflow prevention in HVAC water systems.

Sizes: DN20 to DN600
Pressure: PN16 / Class 150
Swing, dual plate, silent
Cast Iron, SS316 body
Spring-loaded available
Low pressure drop design

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Why Choose Supreme Valves for HVAC

Competitive Pricing

20-30% below European and American suppliers with equivalent quality. Ideal for high-volume HVAC projects.

Fast Delivery

2-4 weeks for standard PN16/Class 150 valves. Buffer stock for urgent requirements. Minimizes project delays.

Full Bore Design

Minimal pressure drop with full bore valve designs. Reduces pumping energy costs over system lifetime.

ISO 9001 Certified

Manufacturing quality certified to ISO 9001. Consistent quality across all valve batches.

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