Pilot Operated Check Valves – LO, LOA Series

*PRODUCT IMAGE IS REPRESENTATIVE PROVIDED BY THE MANUFACTURER. DO NOT MAKE BUYING DECISIONS SOLEY BASED ON THE IMAGE. PLEASE VERIFY SPECIFICATIONS MEET YOUR REQUIREMENTS.

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

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Part No.	Availability	Partner Available	Price	Seal Material	Actuation Type	Weight	Connection Size	Maximum Operating Pressure	Flow Direction	Configuration	Connection Type	Division	Maximum Operating Temperature	Mounting Type	Options	Product Style	Body Material	Maximum Flow Rate	Minimum Operating Temperature	Flow Rate (gpm)	Port Size	Valve Option
LO-10-D	Quote Required	7 In Stock	$366.00/each	N/A	Hydraulic Pressure	6 lb	#10	3000 psi	N/A	N/A	SAE	Hydraulic Valve Systems Division	+200 °F	In-Line	Double PO Check	Piolt Operated Check Valve	High Strength Cast Iron	25 Gal/min	-40 °F	25	SAE-10	Double
LO-50-D	Quote Required	1 Limited Stock	$366.00/each	N/A	Hydraulic Pressure	6 lb	1/2"	2000 psi	N/A	N/A	NPT	Hydraulic Valve Systems Division	+200 °F	In-Line	Double PO Check	Piolt Operated Check Valve	High Strength Cast Iron	25 Gal/min	-40 °F	25	1/2" NPT	Double
LO-50-S	Quote Required	Quote Required	$330.00/each	Nitrile	Hydraulic Pressure	6 lb	1/2"	2000 psi	N/A	N/A	NPT	Hydraulic Valve Systems Division	+200 °F	In-Line	Single PO Check	Piolt Operated Check Valve	High Strength Cast Iron	25 Gal/min	-40 °F	25	1/2" NPT	Single
LOA-25-D	Quote Required	Quote Required	$305.25/each	N/A	Hydraulic Pressure	2.75 lb	1/4"	2000 psi	N/A	N/A	NPT	Hydraulic Valve Systems Division	+200 °F	In-Line	Double PO Check	Piolt Operated Check Valve	High Strength Cast Iron	8 Gal/min	-40 °F	8	1/4" NPT	Double
LOA-25-S	Quote Required	Quote Required	$276.75/each	Nitrile	Hydraulic Pressure	2.75 lb	1/4"	2000 psi	N/A	N/A	NPT	Hydraulic Valve Systems Division	+200 °F	In-Line	Single PO Check	Piolt Operated Check Valve	High Strength Cast Iron	8 Gal/min	-40 °F	8	1/4" NPT	Single
LOA-38-D	Quote Required	Quote Required	$305.25/each	N/A	Hydraulic Pressure	2.75 lb	3/8"	2000 psi	N/A	N/A	NPT	Hydraulic Valve Systems Division	+200 °F	In-Line	Double PO Check	Piolt Operated Check Valve	High Strength Cast Iron	8 Gal/min	-40 °F	8	3/8" NPT	Double
LOA-6-D	Quote Required	3 In Stock	$305.25/each	N/A	Hydraulic Pressure	2.75 lb	#6	3000 psi	N/A	N/A	SAE	Hydraulic Valve Systems Division	+200 °F	In-Line	Double PO Check	Piolt Operated Check Valve	High Strength Cast Iron	8 Gal/min	-40 °F	8	SAE-6	Double