20
EB 2171 EN
Design and principle of operation
Table 3:
Materials · Material numbers according to DIN EN
Type 2431 and Type 2432 Valves
Body
Red brass (RG5)
CC499K
Spheroidal graphite
iron
EN-GJS-400-18-LT
1)
Stainless steel
1.4408
2)
Valve seat
Stainless steel 1.4305
1.4404
Valve plug
1.4305 and brass, resistant to dezincification, with
EPDM soft seal
3)
Valve spring
Stainless steel 1.4310
Type 2430 Control Thermostat
Set point adjuster
PTFE, glass fiber reinforced
Temperature
sensor
Capillary tube
Copper
Thermowell
Copper or stainless steel 1.4310
1)
Type 43-2 with flanged body valve (DIN only)
2)
For Type 43-1 and Type 43-2 with flanged valve body
3)
For oils (ASTM I, II, III): FKM soft seal
Table 4:
Dimensions in mm and weights in kg
Type 2431 Valve (female thread)
Valve size
G ½
G ¾
G 1
Length L
65
75
90
Height H
180
Height H2
CC499K
30
1.4404
46
Width across flats SW
34
46
Weight
Type 43-1 with bulb sensor and
thermowell
1)
(approx. kg)
1.4
2)
1.5
2)
1.6
2)
1)
Version without thermowell: minus 0.2 kg
2)
Stainless steel body +0.2 kg
