Piston Valves Air Valves
Description
Piston valves are a type of valve that utilize a piston-shaped closure member to control the flow of fluids. The piston moves into or withdraws from the seat bore to open or close the valve, effectively managing the flow of the medium through the valve.
Working Principle
Piston valves operate by moving a piston into or out of the seat bore. When the valve is opened, the piston is fully withdrawn, allowing flow to commence. The design ensures that any erosive damage occurs away from the seating surfaces, which helps in maintaining the integrity of the valve. The piston also wipes away any solids that might have settled on the seat during closure, making these valves suitable for handling fluids with suspended solids. This mechanism is beneficial as it allows for easy maintenance and replacement of the piston and seat without the need for machining, effectively restoring the valve to a like-new condition.
Applications
Piston valves are used in various applications where the handling of fluids with suspended solids is necessary. For instance, they are employed in systems that require reliable sealing and are ideal for low flow rates. A specific example includes their use in automotive cooling systems for emergency vehicles, where they help reduce energy consumption during idling by ensuring robust and leak-proof operation.
Advantages over other Air Valves
Piston valves offer several advantages over other types of air valves. They provide dependable sealing and are highly customizable to meet specific application requirements. Their design allows for easy maintenance and replacement of components, which can extend the valve's service life and reduce downtime. Additionally, the ability to handle fluids with suspended solids without compromising the valve's integrity is a significant advantage.
Limitations
One limitation of piston valves is that they may not be suitable for applications requiring high flow rates, as they are optimized for low flow conditions. Additionally, while they are robust, the presence of solids in the fluid can still lead to wear over time, necessitating regular maintenance to ensure optimal performance.
Considerations
When considering piston valves, it is important to evaluate the initial costs, which can vary based on customization and material requirements. Operating expenses are generally low due to the valve's durability and ease of maintenance. However, regular inspections and potential replacements of the piston and seat should be factored into the maintenance costs. The accuracy of piston valves in controlling flow is generally high, making them a reliable choice for precise applications.
from Assured Automation
Description: The Angle Seat Valve is a 2/2-way pneumatically actuated piston valve for liquids, gases, steam and some aggressive fluids (vacuum services also.) The superior design of the piston is unique to the market, enabling the plug to retract farther from the flow path, ensuring the highest... [See More]
- Valve Type: Angle; Piston; Control Valve
- Flow (Cv): 5.68 to 77.72
- Valve Size: 0.38 to 2.00
- Maximum Pressure: 232.00
from Radwell International
SHUT-OFF VALVE, SERIES HE-LO, PISTON GATE, MANUAL ACTUATION, 3/2; BISTABLE, 1-10 BAR OPERATING PRESSURE, 6200 L/MIN FLOW RATE, G1/2; G1 PNEUMATIC CONNECTIONS, (197134). FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Gate; Piston
- Actuation: Pneumatic
from Radwell International
ANGLE SEAT GLOBE VALVE, PNEUMATICALLY OPERATED, PLASTIC PISTON ACTUATOR, DN15, 2/2-WAY BODY, THREADED SOCKET DIN ISO 228, BODY CC499K, SEAL, PTFE, NC. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Globe; Piston
- Actuation: Pneumatic
- Connection Description: Threaded
from Radwell International
REGULATOR PISTON TYPE. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Piston
from Radwell International
FILTER / REGULATOR, MINIATURE MODULAR 08 SERIES, RELIEVING, PISTON DRAIN, 0-160 PSI GAUGE, 1/4" NPT PIPE SIZE, 42.1 SCFM, 150 PSIG MAX PRESSURE. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Piston; Drain
from Radwell International
AIR REGULATOR, 1/4" NPT THREAD, 5 TO 160 PSIG, NON-RISING PRESSURE ADJUSTING DIAL, PISTON OPERATED, 32 TO 150 DEGREES F. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Piston
- Connection Description: Threaded
from Radwell International
PNEUMATIC REGULATOR, 0-160 PSI, 23 SCFM, 300 PSI INLET, 1/8 NPTF, KNOB, ALUMINUM BODY, PISTON TYPE. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Piston
- Actuation: Pneumatic
from Radwell International
PNEUMATIC REGULATOR W/GAUGE, F/R PISTON, 1/4, MTL BWL. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Piston
- Actuation: Pneumatic
from Radwell International
MAINTENANCE KIT, BOOSTER REGULATOR KIT, FOR VBA SERIES, THESE KITS INCLUDE; PISTON SEAL, GOVERNOR ASSEMBLY, CHECK VALVE, GASKET, ROD SEAL, MOUNTING SCREWS, COVER C' ASSEMBLY AND GREASE PACK.. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Check; Piston
from Radwell International
FLUID PRESSURE REGULATOR, 363 PISTON PUMP, 3/8 INCH NPTF PORT SIZE, 200 PSIG, 13.7 BAR, STAINLESS STEEL BASE HOUSING, TUNGSTEN CARBIDE SEAT, DOWNSTREAM. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Piston
from Radwell International
FLOW RESTRICTOR, ONE-WAY, ALUMINUM BODY, NBR PISTON SEAL MATERIAL, 1/8 IN CONNECTION DIAMETER, MOUNTING THREAD: M12X1, 0-10 BAR OPERATION PRESSURE. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Piston
- Connection Description: Threaded
from Radwell International
363 PISTON PUMP, REGULATOR. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Piston
from Radwell International
DIAL-AIR REGULATOR, 2", 1600SCFM, PISTON OPERATED. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Regulator; Piston
from Spirax-Sarco
The RP valve is a piston isolation valve with a carbon steel body / bonnet and stainless steel internals. It can be used on steam, condensate and other liquid sytems. [See More]
- Valve Type: Piston
- Maximum Pressure: 1972.51
- Valve Size: 0.50 to 2.00
- Media Temperature: -20 to 797
from AAA Products International, Inc.
2-position, no springs. Double acting piston actuator on one end. Spool stays in shifted position when pilot pressure is removed. [See More]
- Valve Type: Piston; Spool; Directional
- Flow (Cv): 1.70
- Valve Size: 0.25
- Maximum Pressure: 150.00
from Chemac Inc./Uraca/Uhde HPT/Gather/BHDT
High Pressure Piping, Valves and Fittings. Based on the High-pressure valves and fittings to IG standards for pressure ratings of 325 and 700 bar, Chemac Inc offers these for pressure ratings of 500, 1600, 2500, 3200, 3600 and 4000 bar in similar construction with lens-type gaskets. Valves with... [See More]
- Valve Type: Check; Angle; Butterfly; Diaphragm; Globe; Piston; Control Valve; Relief
from ASCO
bull; Unique sealing member isolates pilot air pressure. from mainline fluid. • Variations in pilot air pressure do not affect. valve operation. • Design provides long life handling of lubricated air. • Handle fluids up to 200 °F (92 °C). • Some constructions handle... [See More]
- Valve Type: Piston
- Flow (Cv): 2.80
- Valve Size: 0.38
- Maximum Pressure: 125.00
from ASCO
bull; Unique sealing member isolates pilot air pressure. from mainline fluid. • Variations in pilot air pressure do not affect. valve operation. • Design provides long life handling of lubricated air. • Handle fluids up to 200 °F (92 °C). • Some constructions handle... [See More]
- Valve Type: Piston
- Flow (Cv): 3.60
- Valve Size: 0.50
- Maximum Pressure: 125.00
from ASCO
bull; Unique sealing member isolates pilot air pressure. from mainline fluid. • Variations in pilot air pressure do not affect. valve operation. • Design provides long life handling of lubricated air. • Handle fluids up to 200 °F (92 °C). • Some constructions handle... [See More]
- Valve Type: Piston
- Flow (Cv): 5.50
- Valve Size: 0.75
- Maximum Pressure: 125.00
from ASCO
bull; Unique sealing member isolates pilot air pressure. from mainline fluid. • Variations in pilot air pressure do not affect. valve operation. • Design provides long life handling of lubricated air. • Handle fluids up to 200 °F (92 °C). • Some constructions handle... [See More]
- Valve Type: Piston
- Flow (Cv): 5.50
- Valve Size: 0.75
- Maximum Pressure: 125.00
from ASCO
bull; Unique sealing member isolates pilot air pressure. from mainline fluid. • Variations in pilot air pressure do not affect. valve operation. • Design provides long life handling of lubricated air. • Handle fluids up to 200 °F (92 °C). • Some constructions handle... [See More]
- Valve Type: Piston
- Flow (Cv): 0.31
- Valve Size: 0.25
- Maximum Pressure: 125.00