RF 8686


Wafer type valve in short face-to-face dimension acc. DIN EN 558 / Series 49
Prevents backflow in the pipeline
DN 15 – DN 150: PN 10/16


Product advantages

High serviceability
easy exchange of wearing parts (valve plate, seat) on-site without the need of special tools

Space saving
due to the short face-to-face dimension acc. DIN EN 558

Sandwich design

Any installation position
the non return valves can be installed vertically or horizontally

Low pressure loss
due to optimized opening cross section

Universal use
Resistant against nearly all chemicals except fluoride compoands and liquid alkali metals (sodium, potassium, lithium, caesium and rubidium) at higher temperatures.

Electrically conductive
no expensive antistatic devices necessary

High reliability
Backflow is reliably prevented. Compered to conventional valves in flanged design the weight is much lower and the length much shorter

Long service life

Low noise

Technical data

Nominal sizes:
DN 15 - DN 150

Operating temperature:
-30 °C to +180 °C

Pressure class:
PN 16

Face-to-face dimension:
DIN EN 558-1 Series 49
(DIN 3202 / K4)

Leakage rate:
Test acc. DIN 3230 BN / BO-2
Optional with soft sealing - test acc. DIN 3230 BN / BO-1


Material: Code:
PTFE / carbon  
Support ring:
Material: Code:
Stainless steel 1.4301 63
Valve seat:
Material: Code:
FEP-coated O-Ring (optional) FV
PTFE / carbon TK
Valve plate:
Material: Code:
PTFE / carbon  
Material: Code:
PTFE / carbon  
Material: Code:
Stainless steel 1.4571