ShearFlo SV Directional Control Valves

Pacseal Hydraulics, Inc.

SV Valve Main Contents

 

ShearFlo® SV DIRECTIONAL CONTROL VALVES


PacSeal® rotary SV Directional control valves direct fluid flow to desired ports, with many configurations possible utilizing one or two cylinder ports.


Product Tables

Surface and Industrial Applications
Basic Model SVX Model Port Size Flow Rate Cv
  SV-25 SVX-25  1/4" 10 GPM  0.95
  SV-50 SVX-50  1/2" 30 GPM  3.2
  SV-100 SVX-100  1" 75 GPM  9.2
  SV-150 SVX-150  1 1/2" 180 GPM  21
  SV-200  2" 300 GPM  33
Ocean Service
Model Application
  SVS-Series  SubSea - Rotary ROV Operable
  SVT-Series  TopSide/SplashZone - Rotary Manual Operation

FEATURES


Standard rotor configurations allow for interflow when shifting to be drained to tank through the constantly opened return port.  The all blocked rotor requires an additional case drain port on the housing.


  • ShearFlo® sealing technology ensures high cycle life for critical service applications

    even in contaminated fluids.

  • Hardened stainless steel sealing elements are lapped and polished to exacting

    standards of finish and flatness which produces a leak proof, contaminant resistant

    metal-to-metal seal.

  • The sealing elements are spring preloaded and pressure energized which maintains

    contact between the two sealing surfaces causing continuous lapping during use which

    eliminates small scratches.

 

OPTIONS AVAILABLE


Operation:


  • Manual with 90° detent  2 or 3 positions (standard), or 2 position 45° detent
  • Manual spring centered handle operated
  • Integral SVX actuator available for air or hydraulic operation, spring centered or manual override

    configurations possible

  • Bracket mounted air cylinder for 2 or 3 position actuation


Body Porting Options:

Side and bottom ported are threaded NPT or SAE.

Subplate & manifold mounted configurations have O-ring face seals for interfacing with manifold.



Rotor Flow Pattern:

  • Manipulator - either position operates a cylinder port with the opposite port drained

    to tank, center position cylinders drain to tank and pressure port blocked.

     

  • Selector - either position operates a cylinder port with the opposite port drained

    to tank, center position pressure and cylinder ports blocked.

     

  • Bypass - either position pressurizes a cylinder port with the opposite port blocked,

    center position pressure and cylinder ports blocked.


  • Open Center - either position operates a cylinder port with the opposite port drained to

    tank, center position pressure port to tank, cylinder ports blocked.


  • *All Blocked - either position operates a cylinder port with the opposite port connected to

    return. Center position all 4 ports blocked. Valves have an additional port to drain

    the interflow, caused by shifting, to tank.


  • *Return Center - center position ports flow to tank.

  • *Crossover - either position operates a cylinder port with the opposite port

    connected to return. Center position pressure and both cylinder ports are connected


  • Dual Pressure - two pressure sources are selectable for one cylinder port. The tank return

    position connects the cylinder port to the constantly open return. The fourth position

    is pressure ports and cylinder port blocked.  The primary application is for a single

    operating cylinder such as a rubber press with a gravity return for opening the press.


*Not a normally stocked item. Check with the factory for availibility

 

Detent Pattern:

  • 3-Position: Selector, Manipulator, Open-Center, Bypass, All Blocked, Return Center and

    Crossover (4 way)

  • 2-Position: Bypass, 90° (4 way)
  • 2-Position: 45° Right (CW) or Left (CCW) (3 way)
  • 4-Position: Dual Pressure (4 way)