Union Valve supplies butterfly valves, gate valves and check valves for dependable isolation, backflow prevention and pipeline protection in water and industrial piping systems. Supporting products are selected according to the application, operating conditions and project requirements.
✓ Valve solutions for isolation, non-return and pipeline protection
✓ Selection based on medium, pressure, connection type and installation conditions
✓ Products available to applicable API, EN, BS and AWWA standards
INDUSTRIAL PIPELINE APPLICATIONS
This simplified water-based piping system shows six common locations where valves support isolation, reverse-flow prevention, equipment protection and maintenance.
Simplified industrial water-piping arrangement for application guidance. Actual system layouts, flow paths and valve positions vary according to the medium, operating conditions and project design.
Product selection should be based on the installation location, medium, pipe size, design pressure, temperature, flow velocity, allowable pressure loss, operating method and applicable project standards.
Butterfly valves provide compact isolation for industrial water headers, equipment connections, return lines and branch pipelines. Wafer, lug and double-flanged configurations support different installation, maintenance and actuation requirements.
Connections: Wafer · Lug · Double flanged
Designs: Concentric · Double eccentric
Operation: Manual · Electric · Pneumatic
Typical locations: Main headers · Pump isolation · Equipment inlet and outlet · Branch lines
Gate valves provide full-open or full-closed isolation where an unobstructed flow path and low pressure loss are required. They are suitable for main supply lines, return headers, distribution pipelines and equipment isolation.
Designs: Resilient seated · NRS · OS&Y
Duty: Full-open or full-closed isolation
Typical locations: Main inlet · Pump suction · Equipment isolation · Distribution lines
Selection: DN · Pressure rating · Medium · Connection standard · Operating method
Check valves help prevent reverse flow after a pump stops and protect pumps, equipment and connected pipelines. The valve design and closing response should be selected according to the installation orientation, flow velocity and potential surge conditions.
Types: Swing · Dual plate · Silent check
Duty: Reverse-flow prevention · Pump and pipeline protection
Typical locations: Pump discharge · Equipment outlet · Return lines
Selection: Flow velocity · Orientation · Closing response · Available space · Water-hammer risk
Y strainers remove pipeline debris before it reaches pumps, heat exchangers and other downstream equipment. On pump suction lines, the allowable pressure loss and pump NPSH conditions should be checked before selection.
Duty: Debris removal · Equipment protection
Typical locations: Pump suction where applicable · Equipment inlet · Auxiliary water lines
Selection: Screen opening · Pressure loss · Line size · Medium · Flow rate
Maintenance: Confirm screen-removal space, cleaning access and blowdown arrangement
SELECTION GUIDE
Match the valve to its duty, medium and actual operating conditions. These six points summarize the information required to identify a suitable product configuration.
Define whether the duty is isolation, throttling, reverse-flow prevention, debris removal or automated operation.
Butterfly valves · Gate valves · Check valves · Y strainers
Identify the fluid, corrosiveness, solids content, viscosity and relevant material-compatibility requirements.
Body: Cast iron · Ductile iron · Carbon steel · Stainless steel
Seat: EPDM · NBR · FKM · PTFE
Provide the design and operating pressures, temperature range and any expected surge or vacuum conditions.
Pressure rating · Body suitability · Seat and seal compatibility · Applicable test standard
Confirm shut-off duty, pipe size, flow conditions, installation orientation and available operating space.
Butterfly: Concentric · Double eccentric · Triple offset
Gate: Resilient seated
Check: Swing · Dual plate · Silent
Confirm the connection type, flange drilling, face-to-face dimension and mating-pipe standard before ordering.
Wafer · Lug · Double flanged · Grooved
Specify operating frequency, power supply and required opening or closing time. For actuated valves, include the fail position and control signal.
Lever operated · Gear operated · Electric actuator · Pneumatic actuator
Choose a butterfly valve when compact size, lower weight or frequent operation is important. Choose a gate valve for full-open or full-closed isolation.
Swing, dual-plate and silent check valves may be used. Selection depends on flow, installation position, available space and water-hammer risk.
They determine the required pressure rating, valve design, body material, seat and sealing materials.
Stainless steel, coated ductile iron or suitable linings may be used. Material compatibility must be confirmed against the actual medium and temperature.
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