Single Pilot Operated, Pilot to Open Check Valves | Product Series

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Single Pilot Operated, Pilot to Open Check Valves

Single Pilot Operated, Pilot to Open Check Valves

Puntos de venta

Parker’s P.O. check valve assemblies allow flow up to 150 lpm (40 gpm) with pressures up to 420 bar (6,000 psi). Return flow can be enable by an external pilot supply, which shifts the internal poppet into an open position.

Especificaciones técnicas

  • Índice de caudal máximo: 5, 8, 16, 20, 40 gal/min, 19, 30, 60, 75, 150 L/min
  • Presión de fisuración: 15, 20, 25, 30, 31, 43.5, 50, 72, 85 psi, 1, 1.4, 1.7, 2, 2.1, 3, 3.5, 5, 5.9 bar
  • Material de la junta: D-Ring (Standard), Nitrile, Fluorocarbon
  • Tipo de accionamiento: Pilot Operated
  • Caudal: N/A, 4.2 @ 100 psi (7 BAR), 8.5 @ 100 PSI (7 BAR), 21 @ 100 PSI (7 BAR), Nominal gal/min, N/A, 16 @ 100 PSI (7 BAR), 32 @ 100 PSI (7 BAR), 80 @ 100 PSI (7 BAR), Nominal L/min
  • Presión de trabajo máxima: 3000, 5000, 6000 psi, 207, 350, 420 bar
  • Rango de presión de entrada máxima: 3000, 5000, 6000 psi, 207, 350, 420 bar
  • Tasa de fuga: 2 @ 5000 PSI (350 BAR), 3 @ 6000 PSI (420 BAR), 5 @ 3000 PSI (207 BAR), 5 @ 5000 PSI (350 BAR) drops/min
  • Tamaño de la cavidad: C08-3, C10-3, C12-3, 3C, 53-1, 68-1
  • Función: Single Pilot to Open Check
  • Dirección de flujo: 2 - 1 Free Flow, 2-3 Free Flow
  • Ratio de presión del piloto: 3:1, 4:1
  • Ubicación del piloto: 1, 3
  • Para tipo de fluido: Mineral-based or synthetic hydraulic fluids
  • Viscosidad cinemática máxima: 45-2000 SSU (6 to 420 cSt)
  • Clasificación de eficiencia del filtro: ISO 4406 18/16/13, SAE Class 4
  • Material de la válvula: All parts steel. All operating parts hardened steel
  • Par de instalación: 23, 30, 40, 48, 56, 63 lb-ft, 31, 40, 54, 65, 76, 85 Nm
  • Temperatura de funcionamiento: -35 to +200, -30 to +250, -15 to +400 °F, -37 to +93, -34 to +121, -26 to +204 °C
  • Temperatura máxima de funcionamiento: +200, +250, +400 °F, +93, +121, +204 °C
  • Temperatura mínima de funcionamiento: -35, -30, -15 °F, -37, -34, -26 °C
  • Peso: 0.11 to 0.53 lbs, 0.05 to 0.24 kg
  • Material del cuerpo: N/A

Descripción completa del producto

Parker’s reliable pilot piston style P.O. check valves are designed for critical applications where safety and load holding is required and flows from 19 to 150 lpm (5 to 40 gpm) and pressures up to 420 bar (6,000 psi) are needed. These valves are available with pilot supply to either the 1st port or 3rd port depending on circuit need, and are generally used in conjunction with linear actuators across several markets within mobile or industrial hydraulics, such as aerials, material handling, and construction where durable and low leak valves are necessary to keep the machinery and operators safe.

Markets:
• Aerial
• Construction
• Material Handling
• Miscellaneous Mobile

Features/Benefits:
• Spherical poppet for low leakage
• Hardened precision ground parts for durability
• “D”-Ring design eliminates back-up rings
• Optional sealed pilot piston

Applications:
• Load holding without fine metering

Additional Technical Insight:
Pilot operated check valves, also known as P.O. checks, are used to lock a cylinder in a holding position with minimal leakage or drift. P.O. check valves that can be opened to allow flow in the reverse direction with an external signal to the pilot port. The valves work best when used in conjunction with a control valve that vents the valve ports to tank when centered. Pilot pressure to open the checks for reverse flow is a ratio of the holding pressure, and are typically 3:1 or 4:1. A 3:1 ratio with a 3000psi load requires a 1000psi signal to the pilot port.

Documentos relacionados

Literature and Reference Materials
HVS Global Cartridge Valve Catalog MSG15-3504
Check Valve Technical Tips
Check Valve Technical Tips
MSG15-3504 Check Valve Catalog Pages - All
Selector Guides
Competitive Crossover Tool
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