Standard Pilot Assisted Load Control Valves | Brazil

Standard Pilot Assisted Load Control Valves | Product Series

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Índice de caudal máximo

Ratio de presión del piloto

Mecanismo de ajuste

Tipo de montaje

Presión de sujeción

Rango de control de presión

Tamaño del puerto

Material de la junta

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Standard Pilot Assisted Load Control Valves

Standard Pilot Assisted Load Control Valves

Puntos de venta

Parker’s piloted load control valves are designed to operate independent of downstream pressure to prevent runaway loads under dynamic conditions using a pilot signal, handling pressures up to 420 bar (6000 psi) and flows up to 350 lpm (90 gpm).

Especificaciones técnicas

  • Índice de caudal máximo: 3.7, 5.3, 10, 12, 15, 15.9, 25, 30, 32, 53, 92 gal/min, 14, 20, 37.5, 45, 46.2, 60, 93.75, 112.5, 120, 200, 350 L/min
  • Ratio de presión del piloto: 1:1, 1.75:1, 3:1, 4:1, 4.5:1, 5:1, 6:1, 7:1, 8:1, 10:1
  • Mecanismo de ajuste: N/A, Fixed, Knob, Screw, Shimmed (non-adjustable), Standard (adjustable), Tamper Resistant
  • Tipo de montaje: Double Gasket, Double Inline, Single Gasket, Single Inline, Flanged Cartridge Valve, Threaded Cartridge Valve
  • Presión de sujeción: 500, 1000, 1500, 2000, 2500, 3000, 3120, 3500, 5000 psi, 34.5, 69, 105, 140, 170, 210, 215, 240, 350 bar
  • Rango de control de presión: N/A, 250-500, 300-1300, 500-1500, 725-5000, 725-6000, 1000-2500, 1500-3000, 2400-5000 psi, N/A, 17.2-34.5, 20.7-90, 34.5-103.4, 50-350, 50-420, 69-172.4, 105-210, 166-350 bar
  • Tamaño del puerto: N/A, SAE-6, SAE-8
  • Material de la junta: Nitrile, Fluorocarbon
  • Caudal: 3.7, 5.3, 10, 12, 15, 15.9, 25, 30, 32, 53, 92 gal/min, 14, 20, 37.5, 45, 46.2, 60, 93.75, 112.5, 120, 200, 350 L/min
  • Presión de trabajo máxima: 3000, 5000, 6000 psi, 210, 350, 420 bar
  • Rango de presión de entrada máxima: 3000, 5000, 5500, 6000 psi, 210, 350, 380, 420 bar
  • Sensibilidad de control de presión: N/A, 115 per turn, 153 per turn, 307 per turn, 493 per turn, 640 per turn, 653 per turn, 1435 per turn, 1640 per turn psi, N/A, 7.9 per turn, 10.5 per turn, 21.2 per turn, 34 per turn, 44 per turn, 45 per turn, 99 per turn, 113 per turn bar
  • Función: Counterbalance Valve
  • Tipo de accionamiento: Pilot Operated
  • Ubicación del piloto: External, Internal
  • Material del cuerpo: N/A, Aluminum
  • Tipo de operación: Restrictive, Semi-Restrictive, Standard
  • Dirección de flujo: Cylinder port 1, Cylinder port 2, Cylinder port C, Valve port 2, Valve port 3, Valve port V, Pilot port 1, Pilot port 3, Pilot port P
  • Tasa de fuga: 5 @ 80% of setting, 6 @ 1450 PSI (100 BAR) drops/min
  • Tamaño de la cavidad: N/A, 53-1, 68-1, 3C, 3K, 3M, CDD-1010, CDD-1036, C10-3
  • Par de instalación: N/A, 22, 30, 54, 68-75, 85, 100, 102-108 Nm, N/A, 16, 22, 40, 50-55, 63, 74, 75-80 lb-ft
  • Para tipo de fluido: Mineral-based or synthetic hydraulic fluids
  • Clasificación de eficiencia del filtro: ISO 4406 18/16/13, SAE Class 4
  • Viscosidad cinemática máxima: 45-2000 SSU (6 to 420 cSt)
  • Material de la válvula: All parts steel. All operating parts hardened steel
  • Temperatura de funcionamiento: -30 to +250, -15 to +400 °F, -34 to +121, -26 to +204 °C
  • Temperatura máxima de funcionamiento: +250, +400 °F, +121, +204 °C
  • Temperatura mínima de funcionamiento: -30, -15 °F, -34. -26 °C
  • Peso: 0.17 to 4.5 lbs, 0.08 to 2.05 kg

Descripción completa del producto

Parker’s piloted load holding/counterbalance valves are a combination of a relief, sequence, and flow control valve that can handle pressures up to 420 bar (6000 psi) and flows up to 350 lpm (90 gpm). These robust valves allow the operator to maintain control of the load by preventing it from overrunning the pump while also protecting against thermal expansion. The wide selection of pilot ratios enables the valve to open based off a given backpressure specific to the application, which could be much lower than the spring pressure setting. This feature allows predictable and consistent control of a load throughout its lowering cycle.

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

Features/Benefits:
• Hardened, precision ground parts for durability
• Poppet style construction with minimal leakage
• Tamperproof versions available
• Single cartridge valve with integral reverse flow check valve
• Available pilot ratios 8:1 to 1.5:1
• All external parts zinc plated

Applications:
• Load holding
• Position holding

Additional Technical Insight:
The load control valves are load assisted i.e the pilot pressure acts on the difference between the setting and the load at the pilot ratio.
It should always be set at a minimum of 30% higher than the maximum load induced pressure to ensure the valve closes correctly.
Sizing a counterbalance valve needs care in that the flow required is usually higher than system pump flow, as in the case with a cylinder application (retract flow could be twice the system flow) though oversizing the valve could cause instability.
Because of  dynamic load variations in many applications, it may be necessary to use a lower pilot ratio or fit an orifice in the pilot line in order to gain stability. The valve will be affected by backpressure and care must be taked with proportional and closed center systems.

Documentos relacionados

Literature and Reference Materials
HVS Global Cartridge Valve Catalog MSG15-3504
Load/Motor Control Valves Technical Tips
MSG15-3504 Load/Motor Control Valves Catalog Pages - All
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