Pilot Operated Check Valves – LO, LOA Series | Product Series

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Pilot Operated Check Valves – LO, LOA Series

Pilot Operated Check Valves – LO, LOA Series

Where to Buy

Parker’s LO & LOA are Pilot Operated Check Valves that are designed to lock a cylinder, or part of a circuit, without leakage while a control valve is in the neutral position.

Technical Specifications

  • Connection Size: #10, 1/2", #6, 1/4", 3/8"
  • Maximum Operating Temperature: +200 °F
  • Maximum Flow Rate: 25, 8 gal/min
  • Configuration: N/A
  • Minimum Operating Temperature: -40 °F
  • Actuation Type: Hydraulic Pressure
  • Options: Single PO Check, Double PO Check
  • Connection Type: SAE, NPT
  • Product Style: Pilot Operated Check Valve
  • Flow Direction: N/A
  • Seal Material: Nitrile
  • Maximum Operating Pressure: 3000, 2000 psi
  • Body Material: Cast Iron (GSJ)
  • Mounting Type: In-Line
  • Weight: 6, 2.75 lb

Full Product Description

Parker’s Parker LO & LOA Pilot Operated Check valves provide load holding where fluid leakage through the control valve may adversely affect the performance of the system such as clamps, outriggers, and work platforms. Additionally, they can be applied to prevent movement of a load while the pressure source is inactive and a control valve is inadvertently actuated.

A control valve with a free flow (motor) spool should be used on any circuit which includes a Pilot Operated Check. This spool option will prevent unwanted pressure build up between the Control valve and Pilot Operated Check Valve.

Markets:
• Aerial
• Agricultural Machinery
• Construction Equipment
• Defense
• Forestry Equipment
• Marine
• Material Handling Equipment
• Mining
• Misc Transportation
• Oil & Gas
• Other Mobile
• Other Natural Resources
• Rail
• Refuse
• Turf Equipment
• Vocational and Municipal Equipment

Features/Benefits:
• Standard porting options for the LO are 1/2” NPT and SAE-10  
• Both versions are available in single and double acting versions
• Standard porting options for the LOA are 1/4” NPT, 3/8” NPT, and SAE-6
• Both Models are rated at 3000 PSI with SAE ports. The maximum recommend actuator flow for the LO is 25 GPM. The LOA is rated at a lower 8 GPM actuator flow

Applications:
• Suitable for various mobile applications

Related Documents

Literature and Reference Materials
HY14-2405 - Mobile Accessory Valve Catalog pages
Pilot Operated Check Valve Catalog - LO Series
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Products Flow Rate (gpm) Port Size Valve Option
LO-10-D 25 SAE-10 Double
LO-10-S 25 SAE-10 Single
LO-50-D 25 1/2" NPT Double
LO-50-S 25 1/2" NPT Single
LOA-25-D 8 1/4" NPT Double
LOA-25-S 8 1/4" NPT Single
LOA-38-D 8 3/8" NPT Double
LOA-38-S 8 3/8" NPT Single
LOA-6-D 8 SAE-6 Double
LOA-6-S 8 SAE-6 Single

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