Why you should use a “Shear-Seal” valve from Barksdale Controls
“For superior control in Hydraulic Systems of course”
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What is a “Shear-Seal”
- The Shear-Seal®is a small hardened metal cylinder that is inserted in a bored hole in the valve body. The face of the cylinder forms a seal against the face of the rotor.
- The passage between the outside of the cylinder and the bore in the body is sealed by an O-ring. The O-ring is protected by two backup rings, one on either side.
- A wave washer sits underneath the cylinder and holds the sealing end of the Shear-Seal®in contact with the face of the rotor.
The flow of the media creates differential pressure pushing the Shear-Seals up against the rotor which increases the sealing force and prevents leakage
- Hardened Metal to Metal Seal
- Virtually Zero Leakage
- 3cc/min max allowable*
- Usually zero
- Improves with use
- Media flows through internal galleries – not across sealing faces
- Excels at handling contaminated medias
- Dirt cannot score shear-seals
- Surfaces wipe away dirt
- High velocity flows, low pressure drop
Valves Wear In … Not Out
- Media flows through internal galleries
- High velocity flows with low pressure drop
- Long Life with Maintenance-free Service
- Complete control of flow
- Gradual overlapping of round passages
- No sudden surges
- Smooth transition
- Advantages
- Best leakage properties
- Good pressure drop
- Good high-velocity capability
- Design is resistant to dirt
- Throttling capability
- Virtually no operating cost/downtime
- Common Applications Include:
- Hydraulic Drilling Controls
- Shipboard Hydraulic Systems
- Blow Out Preventer Control Systems
- Offshore Oil Rig Systems
- Steel Mill Control Systems
- Chemical Processing Facilities
- Power Generation Facilities
- Accumulator Systems
- Stationary Hydraulic Power Units
- Features
- Integrated design
- Bullet proof actuator design
- #70 Manganese Bronze construction – cost effective alternative to 316 SS.
- Critical applications field tested.
- Zero-leak Shear seal®
- UL/ATEX certified Position Indicator
- 3×2 converter available
- Benefits
- Increase system reliability
- Reduce installation cost
- 60 years of Proven track record
Shear-Seal Valve Poppet Valve Spool Valve
- The Shear-Seal® is flow through
- Pressure drop is minimal
- No obstacles