64 200/112 ED

1/4

64 200/112 ED

0.75

31.75

25.9

15.5

5.1

12.7

Ø4

Ø7.5 (max)Ø7.5

(max)

21.5

30.2

40.5

MERS

FLOW RESTRICTOR VALVE

SERIES 50

HYDRAULIC SYMBOLS

OPERATING PRINCIPLEMOUNTING INTERFACE

— This is a non-compensated flow control valve with a check

valve for reverse free flow. It is made in the modular

version and with mounting surface according to the ISO

4401 (CETOP RP 121 H) standards; it can be assembled

quickly without use of pipes, but using only suitable tie-

rods or bolts, thus forming compact modular groups.

— It is also available as a reversible valve (G* versions).

Meter-in or meter-out control depending on the way of

assembly the valve on the OR subplate.

— All the configurations have an incorporated check valve

that allows reverse free flow (cracking pressure of 0,5 bar).

— It is normally supplied with a hexagonal head adjustment

screw.

CONFIGURATIONS (see hydraulic symbols table)

— “SA”: control of the flow exiting from the actuator on line A .

— “SB”: control of the flow exiting from the actuator on line B.

— “D”: Allows an indipendent flow control exiting from the two chambers of the actuator. (Standard)

— “RD”: Allows an indipendent flow control entering in the two chambers of the actuator.

— “G*”: Reversible valve. See at par. 1

MODULAR VERSION

ISO 4401-03 (CETOP 03)

p max

350 bar

Q max (see table of performances)

PERFORMANCES (measured with mineral oil of viscosity 36 cSt at 50°C)

Maximum operating pressure

Check valve cracking pressure

bar

350

0,5

Maximum flow rate in the controlled lines

Maximum flow rate in the free lines

Min. controlled flowrate with ∆p 10 bar

l/min

≤0,060

Ambient temperature range °C -20 / +50

Fluid temperature range °C -20 / +80

Fluid viscosity range cSt 10 ÷ 400

Fluid contamination degree According to ISO 4406:1999 class 20/18/15

Recommended viscosity cSt 25

Mass kg 1,3

ISO 4401-03-02-0-05

(CETOP 4.2-4-03-350)

64 200/112 ED

2/4

MERS

SERIES 50

2 - CHARACTERISTIC CURVES (values obtained with viscosity of 36 cSt at 50°C)

1 - IDENTIFICATION CODE

Seals:

omit for mineral oils

V = viton for special fluids

Series No. (the overall and mounting

dimensions remain unchanged from 50 to 59)

Configurations:

D: meter out control on lines A and B (standard)

RD: meter in control on lines A and B

SA: meter out control on line A

SB: meter out control on line B

Configurations G* - reversible valve (NOTE)

GD: control on lines A and B

GSA: control on lines A

GSB: control on lines A

ISO 4401-03 (CETOP 03) size

Modular version

Flow restrictor valve with

check valve for reverse free flow

M = Adjustment with SICBLOC knob

(omit for adjustment with hexagonal head adjustment

screw)

ADJUSTMENT

PRESSURE DROPS ∆p - Q

M E R S - / / 50 /

KNOB TURNS

only for MERS-*B

only for MERS-*A

3 - HYDRAULIC FLUIDS

Use mineral oil-based hydraulic fluids HL or HM type, according to ISO 6743-4. For these fluids, use NBR seals. For fluids HFDR type

(phosphate esters) use FPM seals (code V). For the use of other kinds of fluid such as HFA, HFB, HFC, please consult our technical

department. Using fluids at temperatures higher than 80 °C causes a faster degradation of the fluid and of the seals characteristics.

The fluid must be preserved in its physical and chemical characteristics.

NOTE: the valve body does not provide the OR seats. The mounting interface is achieved by interposition of an OR subplate. The

control of flow (meter-in or meter-out) is depending on the way of assembly the valve on the subplate.

64 200/112 ED

3/4

MERS

SERIES 50

4 - OVERALL AND MOUNTING DIMENSIONS MERS -D, -RD and -S*

dimensions in mm

MERS-D

MERS-RD

MERS-SB

MERS*/M

adjustment screw on MERS-SA

1 Mounting surface with sealing rings:

N. 4 OR type 2037 (9.25x1.78)

90 Shore

2 Hexagonal head adjustment screw.

Spanner 13

Rotate anticlockwise to increase

flow

3 SICBLOC adjustment knob, upon

request.

To operate, push and rotate at the

same time.

64 200/112 ED

4/4

DUPLOMATIC OLEODINAMICA S.p.A.

20015 PARABIAGO (MI)  Via M. Re Depaolini 24

Tel. +39 0331.895.111

Fax +39 0331.895.339

www.duplomatic.com  e-mail: sales.exp@duplomatic.com

MERS

SERIES 50

REPRODUCTION IS FORBIDDEN. THE COMPANY RESERVES THE RIGHT TO APPLY ANY MODIFICATIONS.

4 - OVERALL AND MOUNTING DIMENSIONS MERS-G*

dimensioni in mm

1 OR subplate code 1955131

(included in the delivery):

N. 4 KANTSEAL DKAR00012

(70 Shore)

Hexagonal head adjustment screw.

Spanner 13

Rotate anticlockwise to increase

flow

3 SICBLOC adjustment knob, upon

request.

To operate, push and rotate at the

same time.

4 Identification label

MERS-G*/M

MERS-GD

MERS-GSB

adjustmet screw on MERS-GSA

meter-in

control

meter-out

control