BarksdaleDT12643 Plunger cylinder

Part No.: DT12643
Description: Plunger cylinder (integral valve spool plunger assembly)
Brand: Barksdale, core internal service spare for Series 9000 Shear-Seal manual hydraulic directional valves, compatible with valve cover 694-82-0 & joystick 900-23-2 / 900-23-3
Core Function
Reciprocating plunger spool inside valve body; linear stroke driven by joystick switches hydraulic passages for directional control, pressure holding & unloading. Adopts patented Shear-Seal design for ultra-low internal leakage.
Complete integrated service kit: plunger rod, wear seal rings, return spring & guide sleeve as one unit for direct full replacement.
When locked by DT11313 locking pin, plunger maintains fixed stroke to sustain circuit pressure without pressure drop.
Material & Precision Specs
Plunger body: Hardened alloy steel with nitrided wear-resistant anti-corrosion surface, resistant to fluid erosion & scratch-free long-cycle operation
Standard seal: NBR nitrile O-rings; Viton fluororubber seals optional for high-temperature oil
Guide sleeve: Oil-impregnated bronze bushing to reduce friction noise during reciprocation
Compatible valve port size: 1/4”, rated for max 350 psi (24 bar) low-pressure pilot circuits
Net weight: 0.045 kg
Environmental & Hydraulic Compatibility
Fluid temp range: -20℃ ~ +80℃; ambient temp -30℃ ~ +70℃
Compatible media: Anti-wear hydraulic oil, dry compressed air; NOT compatible with water glycol fire-resistant fluids
IP54 dust & oil splash protection, for hydraulic fixtures, presses & rescue hydraulic manifolds
Max fluid flow velocity: 20 ft/s, low hydraulic shock & minimal internal leakage for precision clamping circuits
Key Advantages
All-in-one repair assembly; replacement only requires removing top 694-82-0 valve cover, no full disassembly of base skid (841-34-0 / 694-22-0)
Patented Shear-Seal shear sealing minimizes internal leakage, stable long-duration pressure holding
Universal interchangeable spare for all 2/3-position Series 9000 manual valves, fits both gang-release & standard joysticks
Pre-compressed built-in return spring for automatic neutral reset, paired with DT11313 pin for mechanical position lock