File: AM3UP$003_E 03/2008/eIV • 8

4

AM.3.UP.A

AM.3.UP.B

AM.3.UP.AB

AM.3.UP... / AM.3.UP1... MODULAR

PILOT

OPERATED CHECK VALVES

CETOP 3

Max. operating pressure 350 bar

Minimum opening pressure spring 1 1 bar

Minimum opening pressure spring 5 5 bar

Piloting ratio AM.3.UP 1:4

Piloting ratio AM.3.UP1 1:12,5

Max. flow 40 l/min

Hydraulic fluids Mineral oils DIN 51524

Fluid viscosity 10 ÷ 500 mm

2

/s

Fluid temperature -25°C ÷ 75°C

Ambient temperature -25°C ÷ 60°C

Max. contamination level class 10 in accordance

with NAS 1638 with filter ß

25

≥75

Weight 1 Kg

AM.3.UP type modular check valves

allow free flow in one direction by

raising a conical seated poppet valve,

while in the opposite direction the

fluid can return by means of a small

piston piloted by the other line pres-

sure (piloted side).

They are available on single A or B

lines, and double A and B lines (see

hydraulic symbols).

A pre-opening version is also avail-

able (AM3UP1..) only with 5 bar spring.

AM Modular valve

3 CETOP 3/NG6

** UP = Piloted check valve

UP1 = With pre-opening

** Control on lines A / B / AB

* Minimum opening

pressure

1 = 1 bar (only for UP version)

5 = 5 bar

** 00 = No variant

V1 = Viton

3 Serial No.

Curve n. 3 = Piloted side flow

HYDRAULIC SYMBOLS

PRESSURE DROPS AM3UP

PRESSURE DROPS AM3UP1

OVERALL DIMENSIONS

Support plane

specifications

ORDERING CODE

AM.3.UP / AM.3.UP1...

SCREWS AND STUDS CH. IV PAGE 21

The fluid used is a mineral oil with a viscosity of

46 mm

2

/s at 40°C. The tests have been carried

out a fluid temperature of 50°C.

∆p (bar)

Q (l/min)

5 bar

3

Q (l/min)

5 bar

1 bar

3

∆p (bar)