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SHEARFLO® SV DIRECTIONAL CONTROL VALVES

PacSeal Hydraulics’ rotary SV directional control valves are designed with ShearFlo® metal-to-metal sealing technology to ensure high cycle life and negligible internal leakage with superior contaminant resistance, making these valves perfectly suited for critical service applications in harsh and hazardous environments.

Fluid flow is directed to either one or two cylinder ports, based on the selected rotor and detent combination. There are five available sizes based on the porting diameter ranging from 1/8” to 1-1/2” (NPT or SAE). Various actuation options range from standard manual to our integral SVX rack and pinion rotary actuator. For subsea and topside/splash zone applications, see our SVS and SVT options.

The footprint and complexity of a hydraulic control system may dramatically be reduced with PacSeal Hydraulics’ patented integral manifold.

Accessories and repair kits are offered for all SV valves. For replacement parts, download the valve’s respective spec sheet and request a quote online or call PacSeal today

Surface and Industrial Applications

Ocean Service

Features

  • Made in the USA
  • ShearFlo® sealing technology ensures a high cycle life and anti-wear design that is suitable for critical service applications, including contaminated fluids with high flow rates.
  • An essentially zero leak, contaminant resistant metal-to-metal seal for the valve is accomplished by lapping and polishing hardened stainless steel sealing elements to exacting standards of finish and flatness.
  • The sealing elements are spring preloaded and pressure energized, which maintains contact between the two sealing surfaces at all times to prevent contaminants from causing leaks and damage.
  • Movement between the sealing surfaces maintains the lapped, flat surface to ensure a long life that renews with use.
  • Standard rotor configurations yield lubricated shifting with fluid interflow that is drained to tank through the constantly open return port.
  • All SV valves are tested to PacSeal’s strict quality control standards to ensure proper function and reliability.
  • Every ShearFlo sealing component in a repair kit is inspected to ensure trouble-free performance after field maintenance and repair.

Applications

  • Oil and Gas
  • BOP Frac Valve Controls
  • Accumulator Circuits
  • Subsea ROV Panels
  • Mobile Equipment
  • Machine Tools
  • Rubber Molding Presses
  • Marine Controls and Deck Equipment
  • In-Plant
  • Steel Mills
  • Test Stands
  • Pipe Line and Process Valve Actuators
  • High-Pressure Clamping, Crimping and Torqueing

Options

Manual Operation

 

90° detent available in 2- or 3-position operation.
45° detent available in 2-position operation.
Spring centered 3-position operator returns to center after valve shift.
Pin lock detent 3-position operator prevents accidental valve shifting.

 

Remote Operation

 

SVX integral actuator guarantees low power consumption with the greatest performance available for 2- or 3-position air, hydraulic or spring centered operation.
Bracket mounted air or hydraulic cylinder for 2 or 3-position actuation.

 

Body Porting Options

 

Inline (side) and bottom ported available with NPT or SAE threaded ports.

NPT or SAE inline (side) porting
NPT or SAE bottom porting

Subplate and manifold mounted configurations have O-ring face seals for manifold interfacing

Manifold porting with O-ring face seals
Subplate porting with O-ring face seals

 

Rotor Flow Pattern Options

Rotor Config. Center Position CW or CCW Position
Manipulator Cylinder ports return to tank and pressure port is blocked Operates a cylinder port while the opposite port is returned to tank
Selector Return port is open while cylinder and pressure ports are blocked Operates a cylinder port while the opposite port is returned to tank
Bypass Return port is open while cylinder and pressure ports are blocked Operates a cylinder port while the opposite port is blocked
Open Center Cylinder ports are blocked while pressure and return ports are connected Operates a cylinder port while the opposite port is returned to tank
All Blocked* All ports blocked – case drain required Operates a cylinder port while the opposite port is returned to tank
Return Center* Ports flow to tank Operates a cylinder port while the opposite port is returned to tank
Crossover* Pressure and both cylinder ports are connected Operates a cylinder port while the opposite port is drained to tank
Dual Pressure* Two pressure sources are selectable for a single cylinder port. The tank return position connects the cylinder port to the always open return. The fourth position blocks the pressure and cylinder ports. The primary application is for a single operating cylinder as is used in a rubber molding press with a gravity return for opening the press.
*Not a normally stocked item. Check with PacSeal Hydraulics for availability.

 

flow pattern diagrams

Valve Shift Options

Detent Pattern Rotor Options
3-Position (4-way) All options
2-Position 90° (4-way) All options
2-Position 45° CW or CCW (3-way) Selector, Manipulator, Open Center
4-Position (4-way) Dual Pressure
PacSeal Hydraulics

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