DIRECTIONAL VALVES

DCV10 Lock Valve

DESCRIPTION

An in-line-housed, double-pilot-operated, hydraulic check valve with optional thermal

reliefs for use in blocking or load holding circuits.

OPERATION

The DCV10 allows flow from V ports to C ports, while normally blocking flow in the

opposite direction. Flow will be allowed from C to V when pressure is applied to the

opposite side V port.

The valve has a 4:1 pilot ratio, so at least one-fourth of the load pressure held at

either C port is required at the opposite V port to open the flow passage.

The check is spring-biased at 2 bar (30 psi) to assure holding in static or no-load

conditions. An optional sealed piston with check spring bias of 6.9 bar (100 psi) is

available. Optional thermal reliefs are preset to 348 bar (5050 psi) as standard.

NOTE: Thermal reliefs cannot be used with sealed pistons.

FEATURES

• Hardened seat for long life and low leakage.

• Check section serviceable as a cartridge.

• Optional cartridge thermal relief(s).

• Optional sealed piston.

• Optional spring ranges.

• Low pressure drop.

RATINGS

Flow: up to 76 lpm (20 gpm)

Optional Thermal Relief Factory Setting: 348 ±38 bar (5050 ±550 psi)

Thermal Relief Reseat: 207 bar (3000 psi)

Internal Leakage:

Cx to Vx: 0.25 cc/minute (5 drops/minute) maximum at 207 bar (3000 psi);

V1 to V2: (without sealed piston): 328 cc/minute (20 cu. in./minute) maximum

at 240 bar (3500 psi)

Pilot Ratio: 4:1

Check Spring Bias: 2 bar (30 psi); with sealed piston option, 6.9 bar (100 psi)

Temperature: -40 to 120°C with standard Buna seals

Filtration: See page 9.010.1

Fluids: Mineral-based or synthetics with lubricating properties at viscosities of

7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1

Installation: No restrictions; See page 9.020.1

Seal Kit (for CV10-2x): SK10-2x-T (2 required); See page 8.650.1

Pilot Piston Service Part Numbers:

O-Ring (1) – Buna 6001014, Fluorocarbon 6003014

Back-up (2) – Buna 6011014, Fluorocarbon 6011014

ISO SYMBOL

4.251.1

PERFORMANCE (Cartridge Only)

10.3/150

8.3/120

6.2/90

4.1/60

2.1/30

18.9

37.9

56.8

FLOW lpm/gpm

PRESSURE DROP bar/psi

V to C — (r); C to V - - - (p)

32 cSt/150 sus oil at 38°C

75.8

HYDRAFORCE

.com

Blue rectangles are links to other catalog pages.

Cartridge: (CV10-20): Steel with

hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and polyester

elastomer back-ups standard.

Pilot Piston: Hardened steel.

Standard Ported Body: Anodized

high-strength 6061 T6 aluminum

alloy, rated to 207 bar (3000 psi).

Ductile iron bodies available;

dimensions may differ.

See page 8.010.1

Product Weight: 0.68 kg. (1.5 lbs.)

DCV10

DIMENSIONS

MATERIALS

TO ORDER

4.251.2

Porting

SAE 6 6T

SAE 8 8T

DCV10- __ __ - __ - __ - __ __ __

Bias Spring

(Blank) 2.1 bar (30 psi) (Standard)*

(Blank) Thermal Relief (65 psi only)

(Blank) 6.9 bar (100 psi)

(Std. NS and VS seals)

40 2.8 bar (40 psi)

70 4.8 bar (70 psi)

100 6.9 bar (100 psi)

200 13.6 bar (200 psi)

300 20.4 bar (300 psi)

Seals

Buna N (Std.) N

(6.1 bar/30 psi spring minimum required)

Fluorocarbon V

(6.1 bar/30 psi spring minimum required)

Buna N w/Sealed Piston NS

(6.9 bar/100 psi spring minimum required)

Fluorocarbon w/Sealed Piston VS

(6.9 bar/100 psi spring minimum required)

Note: Both check valves must

have same spring value.

* DCV10 valves built with standard

30 psi spring are not stamped with

spring rating. Other spring ratings

are stamped on valve.

Options

None

(Blank)

Thermal Relief on C1 1

Thermal Relief on C2 2

Themal Relief on C1 and C2 3

HYDRAFORCE

.com

Note: Thermal reliefs are not to be used

with sealed pistons (NS and VS).

Blue rectangles are links to other catalog pages.