DISCO-Check valve Type RK 86
Intermediate flange-check valve – chrom- / stainless steel
Valve with closing spring, any mounting position / employment, short size DIN EN
intermediate flange valve (PN10 / 16 / 25 / 40)
Standard metallic sealing with ground connection, stainless steel spring (1.4571)
Application as gravity circulations check, vacuum breaker, breather, foot valve.
RK 86A particularly suitable for low-temperatures, aggressive media, boiler feed water pipes and
other industrial applications.
Approval / certification (partly for an additional charge):
Audit certificate in accordance with EN 10204-2.1; -2.2; -3.1; -3.2
PED 97/23/EG Attachment I, fulfills requirements for use with fluids group 1 and 2
ATEX 94/9/EG, use in potentially explosive atmospheres GII, kat. 2/3 (area 1+21 / 2+22)
N. diameter: DN15 ... DN200
N. pressure: PN40; flanges PN10 / PN16 / PN25 / PN40, ASME on request
Body: RK 86: DN15 ... 100 1.4317, DN125 ... 200 1.0619; RK 86A 1.4408
Cone / Valve plate: DN15 ... DN100 valve plate (1.4571); DN125 ... DN 200 cone (RK 86 1.4006; RK 86A 1.4404)
Gasket: standard metallic sealing; EPDM, FPM, PTFE surcharge
Temperature: RK 86: -10 °C ... 350 °C; RK 86A: -200 °C ... 550 °C; above 300 °C special spring
Face-to-face: EN 558-1 R49 intermediate flange
Optional: spring with different clamp force
The selected non return valve must ensure that the minimum volume flowrate keeps the valve disk in the open position (see pressure drop chart / stable range). Valve construction is very robust, but they are not recommended for use on compressors or where pulsating flow exists. If in doubt please consult us and we will carry out the pressure drop calculation and select a suitable valve.