EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 E-576.A

An Eaton Brand

Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.

Ratings and Specifications

Performance data is typical with fluid at 21,8 cSt (105 SUS) and 49° C (120° F)

Typical application pressure (all ports) 210 bar (3000 psi)

Cartridge fatigue pressure (infinite life) 210 bar (3000 psi)

Rated flow 4 L/min (1 USgpm)

Unloading pressure adjustment range 20-210 bar (300-3000 psi)

Cavity C-10–3

Standard housing materials Aluminum

Temperature range -40° to 120°C (-40° to 248°F)

Fluids All general purpose hydraulic fluids such as:

MIL–H–5606, SAE 10, SAE 20, etc.

Filtration Cleanliness Code 18/16/13

Weight cartridge only 0,15 kg (0.33 lbs)

Seal kits 565812 Buna–N

889611 Viton

Viton is a registered trademark of E.I. DuPont

PUV3-10 - Pilot Unloading Valve

Poppet, internal or external pilot operated, normally closed, unloading

4 L/min (1 USgpm) • 210 bar (3000 psi)

Operation

This valve blocks flow from

port 2 to port 3, until either

the predetermined spring set-

ting has been reached, or an

external pilot has been applied

to port 1. At this time flow is

then allowed from port 2 to

port 3.

The valve will reseat at a per-

centage of the unloading set-

ting as called out in the model

code. This valve can be used

alone for low flow applications

or used as the pilot stage of a

two-stage unloader valve (see

application example). The main

stage of the unloader is typi-

cally a DPS2 logic element.

Features

Hardened poppet and seat.

Very low leakage when piloted

closed without exerting

excessive force on the seat.

Performance DataSectional View

Description

The PUV3 is a two-way,

normally closed, externally

or internally pilot operated

screw-in cartridge type pilot

unloading valve.

Pressure Drop Curves

Cartridge only

Piloted full open

1 2 3

0 0.2 0.4 0.6 0.8 1.0

Pressure Drop - psi

Pressure Drop - bar

Flow - L/min (21,8 cSt oil @ 49°C)

Flow - USgpm (105 SUS oil @ 120°F)

A - 75%

B - 80%

C - 85%

D - 90%

EATON Screw-In Cartridge Valves E-VLSC-MC001-E December 2009 E-577.A

An Eaton Brand

Where measurements are critical request certified drawings. We reserve the right to change specifications without notice.

PUV3-10 - Pilot Unloading Valve

Poppet, internal or external pilot operated, normally closed, unloading

4 L/min (1 USgpm) • 210 bar (3000 psi)

Model Code

PUV3 10 (V)

** ** **/** 00

1 2 3 4 5 6 7 8 9

1 Function

PUV3 - Pilot unloading valve

2 Size

10 - 10 size

3 Seal

Blank - Buna-N

V - Viton

4 Adjustment

C - Cap

S - Screw

5 Port Size

0 - Cartridge only

Code Port Size Housing Number

Aluminum Aluminum

Light duty Fatigue rated

6T SAE 6 566162 –

3B 3/8" BSPP 02–173358 –

6H SAE 6 – 876704

8H SAE 8 – 876711

2G 1/4" BSPP – 876705

3G 3/8" BSPP – 876714

See section J for housing.

8 Unloading Pressure

Setting

Within ranges in

Blank - Normal factory setting

at approximate mid-range.

User requested settings in

3,45 bar (50 psi) steps, Coded

as in the following examples:

10 - 70 bar (1000 psi)

9.5 - 65 bar (950 psi)

9 Special features

00 - None

(Only required if valve has special

features, omitted if "00.")

46,0

(1.81)

Ø 15,82 (0.623)

Ø 17,42 (0.686)

0.875"-14 Thd.

25,4 (1.0) hex

46,0

(1.81)

39,0

(1.53)

"S" Adjustment

"C" Adjustment

Maximum

Tor

que to 1,3

(10 lbf ft)

Dimensions

mm (inch)

Torque cartridge in aluminum

housing to 47-54 Nm (35-40

ft. lbs).

Installation DrawingCartridge Only

– – – – – –

6 Loading (closing)

pressure, as percentage

of unloading pressure75 -

75%

80 - 80%

85 - 85%

90 - 90%

7 Pressure Range

Note:

1530