Hydronit Catalogue

PPC 2017/1-D010

www.hydronit.com +39 03621841210

SECTION D

VMDC20 - DIRECT ACTING MAIN RELIEF VALVE

35,5 Max 53,5

IMPROVED

33,5

P

ø 12,7

3/4-16UNF

T

Hex. 3

Hex. 24

Hex. 13

Hex. 10

20

19

20

M6

Option 2

Option 3

Option 4

Ø 20,5

24

18,5

39,5

M6

Assembly code

Spare part code

P

T

V*** ¨

VMDC

Relief valve

where *** stands for max setting pressure [bar]. Ex. V200

Nominal size: 20 = 20 l/min Working range: A = 3 ÷ 60 bar B = 40 ÷ 120 bar C = 80 ÷ 250 bar D = 150 ÷ 350 bar Option: 1 = M6 screw (std) 2 = handwheel 3 = with cap 4 = plastic seal

20

Main features

where is the option ¨

Max pressure

350 bar 20 l/min 0,14 kg

B

Max flow

Weight

Mounting cavities

0 1 2 5 6 7 8 3 4

Recommended tightening torque: 40 Nm Recommended filtration: 25 ÷ 50 µ Oil temperature: -30 ÷ + 80 °C

1

Note: cavities 3, 4 and 6 are present on central manifold type UB only.

Pressure vs Flow

Minimum setting pressure

180

420

D

P [bar] 150

P [bar] 350

D

120

280

C

C

90

210

B A

60

140

B

30

70

A

0

0

4 8 12 16 20

4 8 12 16 20

Flow [l / min]

Flow [l / min]

Note: Values measured on valve alone (no cavity) with an oil viscosity of 46 cSt at 50 °C. Pressure drop may change depending on fluid viscosity and temperature