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Gate valve

DN1000 Extension stem double flange soft seal gate valve DIN F4 resilient seated gate valve DN450-1200 Resilient Seated Gate Valve DIN F5 resilient seated gate valve Socket connection soft seal gate valve Underground cap soft seal gate valve BS5163 rising stem soft seal gate valve Hard seal gate valve API slab Gate Valve Stainless steel flange gate valve Wafer knife gate valve Pneumatic gate valve Soft seal gate valve Extension stem gate valve UL/FM fire protection groove ends gate valve Rising stem forged steel gate valve carbon steel gate valve Stainless steel threaded gate valve DIN soft seal gate valve ANSI soft sealing gate valve 200PSI Cast iron gate valve BS resilient seated gate valve

Butterfly valve

DN900 pneumatic triple eccentric hard seal butterfly valve D643H Triple Eccentric Butterfly Valve D343H Hard seal butterfly valve Multi standard EPDM seated butterfly valve Single flange butterfly valve DN2000 Double eccentric butterfly valve Flange butterfly valve Lug butterfly valve Wafer butterfly valve with handle Worm gear operated butterfly valve Wafer lined fluorine butterfly valve Stainless steel wafer butterfly valve Stainless steel flanged butterfly valve Three eccentric flange butterfly valve Pneumatic flanged butterfly valve Pneumatic wafer butterfly valve Triple eccentric butterfly valve wafer type Wafer butterfly valve ULC approved Inflatable seat butterfly valve High performance butterfly valve Grooved end butterfly valve Electric soft seal butterfly valve Flange fluorine lined butterfly valve Handle aluminum butterfly valve Worm Gear Aluminum Butterfly Valve Full PTFE lined butterfly valve wafer type One stem no-pin wafer butterfly valve Multi standard aluminum stem butterfly valve Stainless Steel wafer Butterfly Valve Aluminium handle operated lug butterfly valve Lever Operated Flange Butterfly Valve Butterfly valve stem Butterfly valve disc Butterfly valve seat

Ball valve

DN1400 top-mounted eccentric semi-ball valve Flanged three-way ball valve Fully welded ball valve Natural gas ball valve High platform flange ball valve 1 PC ball valve Fixed ball valve PTFE seat flanged ball valve Metal seat ball valve API 6D ball valve 3 Piece ball valve Full Bore 3 way ball valve L-Port 3 Way T-Port ball valve 2PC Ball valve female thread stainless steel

Globe Valve

API Carbon Steel Globe Valve Bellows Globe Valve Stainless steel flange globe valve Stainless steel thread S type globe valve Stainless steel thread B type globe valve Cast Steel Globe Valve Piston Globe Valve WCB Carbon Steel Globe Check Valve electric motorized control stainless steel SS316 globe valve Brass Globe Valve Cryogenic Globe valve HT200 Globe Valve Threaded Stainless Steel Globe Valve GG25 Globe Valve ANSI API Cast Steel And Stainless Steel Globe valve

Check valve

Rubber seal check valve DN800 Slow closing check valve DN800 Rubber Disc Check Valve Butterfly Buffering Check Valve check valve with counter weight Silent Check Valve WCB Swing check valve Swing Check Valve Single Chip Check Valve H74W Stainless Steel Wafer Check Valve Swing Start Check Valve Foot check valve API Swing Check Valve DIN Flange check valve Single plate check valve Lifting Check Valve Bottom Valve Hammer Diminish Noises Check Valve Wafer Check Valve Wafer dual plate check valve

Control valve

Static Balancing Valve Cage Guided Sleeve Globe Control Valve DN1000 Piston Flow Regulating Valve DN1600 Electric Actuator Flow Regulating Valve Pneumatic Flanged Butterfly Valve Pneumatic Wafer Butterfly Valve Angle Seat Valve Pneumatic gate valve Electric three-way control valve Electric sleeve control valve

Water Meter

Vertical Type Water Meters Stainless steel threaded water meter Piston water meter Plastic water meter More flow rotor dry water meter spiral vane flange water meter CI wotlman water meter with pulse output LXCLG(R) Vertical removable element woltman cold (hot) water meter Single flow rotor dry water meter Prepaid Token Water Meter Electromagnetic flowmeter Rotary Piston Liquid Sealed Water Meter Rotary Piston Liquid Sealed Water Meter

Air valve

Double ball exhaust valve Doubleair Air Valve Saudi Doubleair Air Valve Southeast Asia Doubleair Air Valve South America Double Air Valve Threaded Air Valve Single Air Valve Triple Functions Air Valve Automatic Air Release Valve Automatic release valve Automatic exhaust valve Composite Exhaust Air Valve Brass exhaust valve Double Ball Air Valve

Copper valve

4" copper gate valve copper electric solenoid valve brass ball valve Brass exhaust valve Brass Globe Valve Copper Globe Valve Copper Thread Gate Valve Copper Ball Valve （Thread）Copper Strainer

Pipe Repair & Coupling

Flexible Multi-Function Pipe Coupling ZFJ-S SS Semi-Circle Pipe Repair Clamp SJW-H Ductile Iron Band Repair Clamp Stainless Steel Band Repair Clamp Double-Section Pipe Repair Coupling Folding Type Pipe Repair Single-Section Multi-Function Pipe Coupling MF-S Gear-Ring Type Multi-Function Pipe Coupling GR-S ZBW Damping Corrugated Hose

Pipe fittings

HDPE Pipe Seamless Steel Pipe Welded Stainless Steel Pipe Grooved Steel Pipe Double flanged reducer Blank flange Angle branch tee All flange tee Flange cross Double flange bend Flange elbow 45° 90°Double socket taper /reducer Cast Iron Strainer

Strainer

Forged Steel Y Strainer DIN standard Industrial Y Type Strainer for Pump Copper Strainer BS Y Strainer Flange Y-Type Strainer Cast Iron Strainer Threaded Strainer German Standard Y Type Filter ANSI “Y” Strainer

Dismantling Joint

VSSJAFC(CC2F) Detachable Flange Transmission Joint VSSJA-2(B2F) Double Flange Limited Expansion Joint VSSJA-1(BF) Single Flange Limited Expansion Joint VSSJA(AF) Flange Loose Expansion Joint JGD-B Threaded Rubber Joint ZBW Damping Corrugated Hose KXT-S Flexible Dual-Spherical Rubber Joint KXT Rubber Soft Joint Flange Adaptor

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Top 7 Valves for HVAC Systems: How to Choose the Right Type for Your Project

2025-07-20

Introduction: Why Valve Selection Matters in HVAC Systems

Did you know that up to 30% of energy loss in HVAC systems can be traced back to inefficient or improperly selected valves? Whether you're designing a new heating and cooling system or maintaining an existing one, choosing the right valves is crucial for energy efficiency, cost savings, and long-term reliability.

At WEIZIDOM Solution, we specialize in manufacturing high-quality valves for HVAC applications, including butterfly valves, ball valves, check valves, and more. In this guide, we’ll break down the top 10 valves used in HVAC systems, their key benefits, and how to select the best option for your project.

By the end of this article, you’ll know:

* Which valves are best for chilled water, heating, and refrigerant systems

* Key factors to consider when selecting HVAC valves (pressure, material, and flow control)

* How to reduce energy waste and maintenance costs with the right valve choice

Let’s dive in!

Common HVAC Valves & Materials Specification

Valve Type	Primary Function	Standard Materials	Typical HVAC Applications
Butterfly Valve	Large-diameter flow control/isolation	Body: Cast Iron, Stainless Steel (CF8M) Disc: SS304, Aluminum Bronze	Chilled water systems, AHUs
Ball Valve	Refrigerant/steam line shutoff	Body: Brass (CW617N), SS316 Ball: PTFE-coated stainless	Heat pumps, chillers, boiler feed
Check Valve	Prevent backflow	Body: Cast Iron, SS304 Disc: Nylon + SS spring	Pump discharge, condenser lines
Gate Valve	Main pipeline isolation	Body: Ductile Iron (QT450), Carbon Steel (WCB) Gate: SS304	Steam mains, fire sprinkler lines
Globe Valve	Precise flow regulation	Body: Brass, SS304 Stem: SS304	Boiler feedwater, manifold control
Balancing Valve	Hydronic system flow distribution	Body: Ductile Iron Measuring ports: Copper alloy	HVAC branch circuits, radiant floors
Pressure Reducing Valve	Maintain downstream pressure	Body: Carbon Steel Diaphragm: EPDM rubber	Steam stations, high-rise water supply
Solenoid Valve	Automated refrigerant/condensate control	Body: Brass, SS304 Coil: Class H insulation	Chillers, humidifier water lines

Gate Valves – For Straight-Line Flow Shutoff

Best for: Main water supply lines, steam systems, and infrequent operation points

Gate valves provide unrestricted flow when fully open, making them ideal for isolation applications where minimal pressure drop is critical.

Key Benefits:

* Full-bore design – Zero flow restriction when open
* Bi-directional sealing – Works for both forward/reverse flow
* Durable construction – Often used in high-temperature steam systems

Common HVAC Uses:

* Main water supply shutoff

* Steam boiler isolation

* Large-diameter piping systems

Note: Not suitable for throttling – use only for fully open/closed applications.

Butterfly Valves – The Go-To for Large HVAC Systems

Best for: Chilled water systems, cooling towers, and air handling units

Butterfly valves are lightweight, cost-effective, and easy to install, making them a popular choice for HVAC applications requiring large-diameter flow control.

Key Benefits:

* Low pressure drop – Minimizes energy loss in water distribution
* Compact design – Saves space compared to gate valves
* Quick operation – Ideal for systems requiring frequent adjustments

Common HVAC Uses:

* Cooling tower isolation

* Chilled water shut-off

* Air handling unit (AHU) control

Looking for durable butterfly valves? Check our HVAC valve series.

Ball Valves – Reliable Shut-Off for Refrigerant & Heating Lines

Best for: Refrigeration systems, heat pumps, and hydronic heating

Ball valves provide bubble-tight shut-off, making them essential for HVAC refrigerant lines and heating systems where leakage must be avoided.

Key Benefits:

* Zero leakage – Critical for refrigerant and gas applications
* Durability – Stainless steel or brass options for corrosion resistance
* Full-port design – Reduces flow restriction

Common HVAC Uses:

* Refrigerant line isolation

* Boiler feed water control

* Heat exchanger shut-off

Check Valves – Preventing Backflow in Chiller Systems

Best for: Pump protection, chillers, and condenser water systems

Check valves (or non-return valves) ensure one-way flow, preventing costly damage from water hammer or reverse flow in HVAC systems.

Key Benefits:

* Automatic operation – No manual intervention needed
* Reduces pump wear – Protects against backflow damage
* Silent vs. swing check options – Choose based on system requirements

Common HVAC Uses:

* Chilled water pump discharge

* Condenser water systems

* Boiler feed lines

Globe Valves – Precision Flow Control

Best for: Boiler feedwater, condenser water, and throttling applications

Globe valves excel at precise flow regulation thanks to their disc-and-seat design, though they create more pressure drop than gate valves.

Key Benefits:

* Excellent throttling capability
* Finer control than gate/butterfly valves
* Available in angled designs for compact spaces

Common HVAC Uses:

* Boiler feedwater control

* Condenser water balancing

* Steam radiator control

Pro Tip: Use Y-pattern globe valves for high-pressure steam to reduce erosion.

Pressure Reducing Valves (PRVs) – System Protection

Best for: Steam systems, high-rise HVAC, and pump discharge

PRVs automatically lower downstream pressure, preventing pipe damage and ensuring consistent operation.

Key Benefits:

* Maintains safe system pressures
* Reduces water hammer risk
* Self-adjusting for load changes

Common HVAC Uses:

* Steam distribution networks

* High-rise building water supply

* Pump discharge protection

Spec Check: Always size PRVs based on max flow rate, not just pipe diameter.

Bonus: Valve Selection Checklist

When specifying HVAC valves, always verify:

* Pressure/temperature rating vs. system requirements

* Material compatibility (e.g., brass for water, stainless for refrigerant)

* Flow characteristics (full-port vs. reduced-port)

* Actuation method (manual, electric, pneumatic)

* Certifications (ASME, ANSI, ISO for industrial projects)

Frequently Asked Questions (FAQs) About HVAC Valves

* What is the best valve for chilled water systems?

Butterfly valves are ideal for large-diameter chilled water pipes, while ball valves work best for smaller refrigerant lines.

* How do I prevent water hammer in HVAC systems?

Use slow-closing check valves or install pressure surge arrestors to minimize hydraulic shock.

* Can I use brass valves for refrigerant applications?

Yes, but stainless steel or forged brass valves are recommended for high-pressure refrigerant systems.

* What’s the difference between a balancing valve and a regular globe valve?

Balancing valves have calibrated flow measurement ports, allowing precise hydraulic balancing in HVAC systems.

* How often should HVAC valves be maintained?

Annual inspections are recommended, with lubrication and seal replacement as needed.

* Where can I buy high-quality HVAC valves in bulk?

WEIZIDOM Solution supplies ISO-certified valves for HVAC systems—contact us for wholesale pricing!

Need Custom Valve Solutions?

As a leading valve manufacturer, WSD Solution provides:

* HVAC-specific valve designs

* Material customization (brass, stainless, Ductile Iron)

* Bulk order discounts

Email: eileen@wsdsolution.com

WhatsApp: +86 13849184495

Pre : Project Leaks and Backflow? 90% of the Time, the Problem Lies in This Tiny Valve!

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