Overflow valves with flanged connection

The overflow valves with flanged connection are used for actuation type E: with adjustment screw.

The valves are suitable for use with lubricating and hydraulic oils and many other self-lubricating non-corrosive fluids. They deliver excellent heating oils EL, L, M, S and ES, coal tar oils and kerosene.

Technical Data:

Material

casing of hydraulic cast iron (GGG 40); certificate on request; piston, valve tip, spring of hardened steel

Details

  • Maximum temperature of fluid medium: 150 °C
  • Function: Directly-controlled, spring-loaded overflow valve for maintaining a set operating pressure or a set maximum pressure in a pressure pipe
TÜV Rheinland
Modelp Possible pressure stages for
each model
Flange

DIN2635 PN 40

Flow range 2)
l/h
Viscosity range 2)

cSt

Item No
FDR 15 – E – 0 = 0,5 – 1,5 bar DN 15 1) 30 – 600 2,8 bis 480 270001
FDR 20 – E – 3) 1 = 1 – 4 bar DN 20 1) 100 – 2000 2,8 bis 480 270002
FDR 25 – E – 2 = 2 – 9 bar DN 25 1) 300 – 6000 2,8 bis 480 270003
FDR 32 – E – 3 = 6 – 25 bar DN 32 1) 500 – 10000 2,8 bis 480 270004
FDR 50 – E -4) 4 = 15 – 40 bar DN 50 8000 – 20000 2,8 bis 480 270006

1) Counterflange with seal + screws must be ordered separately
2) For curves see page 31
3) Not pressure stage 0, for pressure stage 1: 0.5 – 3.5 bar, all further pressure stages according to table
4) Only with:

Pressure stage 1: 1 – 4 bar
Pressure stage 2: 2 – 9 bar
Pressure stage 4: 6 – 40 bar

Size table

Model with
hp-Overflow
valve
a b DIN flange
DIN 2635
Ø D Ø k Ø d suitable

Counter flange

from PN 10 – 40

to DIN EN 1092

FDR 15 B – G = 1/2“ 55 92 DN 15 95 65 14
FDR 20 B – GH = 3/4“ 63 118 DN 20 105 75 14
FDR 25 B – GHG = 1“ 80 134 DN 25 115 85 14
FDR 32 B – GHG = 1 1/4“ 80 138 DN 32 140 100 18
FDR 50 140 205 DN 50 165 125 18

For installation, operation and maintenance, follow the operating instructions that come with each piece of equipment.

Need additional infos? Please contact us

Jochen Twellaar

+49 (0) 721/95618-23

twellaar@hptechnik.com

Joachim Rau

+49(0) 721/95618-25

rau@hptechnik.com