Page 50 (Seals and O-Rings)

DANA GRESEN V20 - Seals and O-Rings

DANA GRESEN V20

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Hydraulic Supply Co.

Table of Contents

Table of Contents2
Description4
Casting Part Number4
Spool Action Options5
Handle Assemblies5
Maintenance6
Replacing, Adding or Removing Section Assemblies6
Schematic View of Typical Control Valve Assembly6
Replacing Spool Seals7
Parts Ordering Information8
V20 Seal Identification Chart8
Inlet Covers9
Outlet Covers10
Valve Center Sections12
Parts Listing13
Directional Control Valve, Typical Main Assembly13
4-Way, 4-Position Float Valve Section15
4-Way, 3-Position Valve Section16
3-Way, 3-Position Valve Section17
4-Way, 3-Position Valve Section with Pressure Detent Release (KO)18
4-Way, 3-Position Lockout Valve Section19
4-Way, 3-Position Tandem Valve Section20
4-Way, 3-Position, Low Pressure Drop Valve Section21
4-Way, 3-Position, Tandem, Low Pressure Drop Valve Section22
4-Way, 3-Position, Series Valve Section23
4-Way, 4-Position Float, Series Valve Section24
Standard Spool Positioner25
Manual Spool Positioner25
4-Way, 4-Position Float Detent Positioner26
Option "R" Detent with Spring Return to Neutral27
Option "D" 3-Position Detent Spool28
Option "A" Spring, Extended Spool28
Electro-Magnetic Spool Release Positioner29
Optional Pressure Detent Release (KO) Positioner30
Option "W" Rotary Spool Positioner31
Series or Low Pressure Drop, Standard Spool Positioner31
V2-S 4-Way, 4-Position Float (Out) Detent Positioner32
Standard Seal Retainer33
Optional Heavy Duty Seal Retainer with Optional Spool Wiper33
Handle Bracket Assembly34
Optional Vertical Handle and Bracket Assembly35
Optional Horizontal Handle and Bracket Assembly36
Spool Protective Boot Assembly36
Lockout Check Assembly37
Optional Anti-Cavitation Check Assembly38
Load Check Plug Assembly39
Optional Model RC Cylinder Port Relief40
Optional RCA Relief Assembly41
Optional RP 20-N Cylinder Part Relief42
Optional Combination Relief and Anti-Cavitation Check Assembly (RCA)43
Optional V20S Work Port Relief, Model RCS44
Model WH Differential Poppet Main Relief Valve45
Model WHA Differential Poppet Main Relief Valve46
Model RP51 Pilot Operated Main Relief Valve47
Flow Control Assembly, Inlet Cover48
"NR" Main Relief Plug49
Work Port Restrictions49
Seals and O-Rings50

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