Series III-L Valves

  • Original Shear-Seal® technology
  • 2 & 3 position valve
  • 2 position actuated valve
  • Manual override
  • Air or hydraulic integrated actuator
  • Superior shifting performance
  • High flow with low pressure drop
  • Rugged integrated solution
  • Extended shaft for alternate position sensor
  • Robust detent stop
  • Panel mounting option
  • Position indication option
  • Suitable for hydraulic & water glycol media

Barksdale's Series III-L valve provides an optimal solution for the upmost reliability and safety by combining the dependable features of our heavy duty Shear-Seal® valves with the reliability of the integrated actuator, providing an all in one package saving customers time in installation and maintenance.

With the ability to handle high pressure demands between 3000 to 5000 psi while maintaining a high flow capability of 75 GPM, the Series III-L is well suited to tolerate contaminated media. The combination of the high flow and high pressure and virtually zero-leakage* makes the Series III-L valve the choice for the toughest applications where zero-leakage* is a must.


General Specifications*

– Main Valve
Media Type: Hydraulic oil only or water based with
stainless steel body
Working Pressure:
1” Size:
Hydraulic up to 3,000 or 5,000 psi
(206 bar or 345 bar)
Back Pressure: 250 psi (17.2 bar) max at return port
Proof Pressure: 1.5x working pressure except at return port
Burst Pressure: 2x working pressure except at return port (3,000 psi [206 bar])
Pressure Drop (all Valves): See supplemental guide for detailed information
Porting: 1” NPT standard
Optional: SAE 16 (SAE J1926)
Media Temperature Range: -30° to +185°F (-34.4° to +85°C)
Handle Detent: All valves have 3-position detents for manual shift to center position
Panel Mounting: Standard for 1/4”- 1/2” valves Refer to sales drawings for 1” & 1-1/2” valves
Wetted Materials:
Rotor & Seals:
Standard O-Rings:
Phosphate coated carbon steel or stainless steel option
Stainless steel
400 series stainless steel
Buna N
Option: Viton®, Neoprene, EPR
Handle & Detent Disc:
Phosphate coated carbon steel
Plated carbon steel
Plated carbon steel
Flow Characteristics: Cv Factor = 9.2
Capacity : 75 GPM @ 60ft/sec
– Pilot Actuator
Working Pressure:


Range: 80 to 120 psi
(5.5 to 8.3 bar)
Range: 200 to 1,000 psi
(13.8 to 68.9 bar)
Porting: 1/4”- 18 NPT
Media Temperature Range: -30° to +185°F (-34.4° to +85°C)
Speed of Operation: 1/2 second or more for 90° throw to avoid damage (Restrict actuator flow to control speed)
End Plate:
Hard anodized aluminum
Anodized aluminum
Plated carbon steel
Weight (Valve & actuator): 48 lbs (21.8 kg) : pneumatic model
49 lbs (22.2 kg) : hydraulic model


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