Water & HVAC Valve Manufacturer in Italy
Hydronic systems depend on more than simple pipeline isolation. Chilled-water and hot-water circuits require valves that can isolate equipment, balance flow, prevent reverse flow and regulate water through pumps, chillers, heat exchangers and air-handling units.
EuroValve Italia is a Water & HVAC Valve Manufacturer in Italy offering ball, butterfly, gate, check, balancing and control valve configurations for water circulation and HVAC systems. Different body materials, seating arrangements, connection types and operating methods can be selected according to system pressure, temperature, design flow and installation requirements.
What are Water & HVAC Valves?
Water and HVAC valves are used to isolate, regulate, balance or direct water flow within heating, cooling and water-distribution systems. Their function depends on the valve design and its position within the hydraulic circuit.
Isolation valves allow equipment or sections of pipework to be shut off for operation or maintenance. Balancing and control valves regulate flow through individual circuits, while check valves prevent reverse flow at pumps and other critical locations.
Types of Water & HVAC Valves
| Valve Type | Function & Application |
|---|---|
| Butterfly Valve | Compact quarter-turn isolation for chilled-water, condenser-water and larger hydronic pipelines. Wafer and lug configurations are commonly used. |
| Ball Valve | Quarter-turn shut-off for smaller water lines, equipment connections and HVAC branch circuits. |
| Gate Valve | Full-flow isolation for water mains, headers and other sections where the valve normally operates fully open or fully closed. |
| Check Valve | Automatically prevents reverse flow and is commonly installed at pump discharge and other locations requiring non-return protection. |
| Manual Balancing Valve | Allows flow to be measured and adjusted during hydronic system commissioning to establish the required design flow. |
| Automatic Balancing Valve | Maintains the specified flow within its operating range as differential pressure conditions change within the circuit. |
| Control Valve | Modulates water flow in response to a control signal for temperature, flow or other HVAC control requirements. |
Technical Specifications
| Parameter | Technical Options |
|---|---|
| Service | Chilled Water, Hot Water, Condenser Water, Cooling Water, Water-Glycol Mixtures |
| Valve Functions | Isolation, Balancing, Flow Regulation, Non-Return Protection |
| Valve Designs | Ball, Butterfly, Gate, Check, Balancing, Control |
| Pressure Ratings | PN 10, PN 16, PN 25 and higher ratings according to valve type and construction |
| Connections | Threaded, Wafer, Lug, Flanged |
| Seating | EPDM, NBR, PTFE, RPTFE and Metal according to valve type and service |
| Operation | Lever, Handwheel, Gear, Electric Actuator, Pneumatic Actuator, Automatic |
| Flow Parameters | Kv / Cv, Design Flow and Differential Pressure where applicable |
| Flanged Connections | EN 1092-1 / EN 1092-2 according to body material and valve construction |
| Inspection & Testing | EN 12266-1 where applicable |
Flow Balancing and Control in HVAC Systems
Hydronic balancing is used to establish the required water flow through different branches of a heating or cooling system. Manual balancing valves allow the flow to be measured and adjusted during commissioning, while automatic balancing valves respond to changing differential pressure to maintain the required flow within their operating range.
Control valves perform a different function by continuously changing the available flow area in response to the building or process control system. Two-way and three-way control arrangements can be used according to the hydraulic circuit, with valve selection based on design flow, available differential pressure and required Kv or Cv.
Materials and Grades
Materials for water and HVAC valves should be selected according to system pressure, water temperature, glycol concentration, corrosion conditions and valve function. Ductile iron and cast iron are widely used for larger hydronic valves, while bronze, brass and stainless steel are relevant to smaller valves and corrosion-resistant constructions.
| Material Family | Relevant Materials & Grades |
|---|---|
| Cast Iron | EN-GJL-250 / EN 1.6025 and related cast iron grades for applicable HVAC valve bodies |
| Ductile Iron | EN-GJS-400-15, EN-GJS-450-10, EN-GJS-500-7 and related ductile iron grades |
| Carbon Steel | ASTM A216 WCB and ASTM A105/A105N for applicable industrial water valve constructions |
| Stainless Steel | ASTM A351 CF8/CF8M, 304, 304L, 316, 316L; EN 1.4301, 1.4307, 1.4401, 1.4404 |
| Bronze | Bronze grades for applicable balancing, isolation and smaller water valve constructions |
| Brass | Brass and dezincification-resistant brass for applicable small-bore HVAC and balancing valves |
Valve Seating and Sealing
Seat and seal selection is particularly important in hydronic systems because the elastomer or polymer must remain compatible with the circulating fluid and operating temperature. EPDM is commonly used in chilled-water and hot-water valve constructions, while PTFE and RPTFE are used in applicable ball, control and other valve designs. NBR can be selected where its temperature and fluid compatibility suit the application.
Where glycol is present in a heating or cooling circuit, both the valve body and sealing materials should be checked against the specified glycol type, concentration and operating temperature.
Applications
| Application | Typical Valve Requirement |
|---|---|
| Chilled-Water Systems | Isolation, balancing and flow control through chillers, AHUs and distribution circuits |
| Hot-Water Systems | Isolation and regulation of circulating heating water |
| Cooling Towers | Isolation and control of condenser-water circuits |
| Air Handling Units | Flow isolation, balancing and control at heating and cooling coils |
| Pumping Systems | Isolation and non-return protection at pump suction and discharge locations |
| District Cooling | Flow isolation, balancing and control across distribution networks and building interfaces |
| Industrial Water Circuits | Isolation and flow regulation in compatible cooling and utility-water systems |
Selecting Water & HVAC Valves
Valve selection should consider the required function, line size, operating pressure, water temperature, design flow, differential pressure, glycol concentration, connection type and available installation space. Isolation, balancing and control valves should be selected according to their individual hydraulic duty rather than using one valve design throughout the system.
For technical selection or quotation, provide the valve type, line size, operating pressure and temperature, design flow where applicable, water or glycol concentration, connection requirements, material requirements and preferred operation or actuation.
