Service temperature

Material and actuator service temperatures

The following material and actuator temperatures can be used as guidelines to define minimum and maximum temperatures for the knife gate valve. Please contact Stafsjö at sales@stafsjo.se for advice.

Discover more

Service tempatures

Valve body/retainer ring materials Service temperatures Standard field of use
Duplex stainless steel EN 1.4470 -50 °C – +250 °C / -58 °F – +482 °F
Hastelloy C276 -30 °C – +425 °C / -22 °F – +797 °F
Nodular iron EN-JS1050, GGG50 -10 °C – +200 °C / 14 °F – +392 °F WB11 < DN 300, WB14-L < DN 300, MV-L < DN 300
Nodular iron EN 5.3105 -10 °C – +350 °C / 14 °F – +662 °F HG-L, MV-L > DN 350, SLF, SLH, SLV, SLX, WB > DN 350,
WB14 > DN 350,
Super duplex stainless steel EN 1.4410 -50 °C – +250 °C / -58 °F – +482 °F
Stainless steel EN 1.4408 -50 °C – +400 °C / -58 °F – +752 °F D2G, HG, HL, HP, HX,  JTV, MV, RKO, TV, WB14E, XV
Titanium ASTM B265 Grade 2 -40 °C – +300 °C / -40 °F – +572 °F HPT
254 SMO stainless steel equivalent -40 °C – +399 °C / -40 °F – +750 °F
Gate materials Service temperatures Standard field of use
Duplex stainless steel EN 1.4462 -40 °C – +400 °C / -40 °F – +752 °F JTV, HP, HX > DN 400, SLF, SLH, SLV, RKO
Hard anti-stick coated duplex stainless steel EN 1.4462 -40 °C – +250 °C / -40 °F – +482 °F SLH
Super duplex stainless steel EN 1.4410 -40 °C – +400 °C / -40 °F – +752 °F
Stainless steel EN 1.4301 -40 °C – +400 °C / -40 °F – +752 °F MV-L DN 50-DN 500, RKS, WB, WB11, WB14-L
Stainless steel EN 1.4404 -40 °C – +400 °C / -40 °F – +752 °F D2G, HG, HL, HX < DN 350, MV-E, TV, WB14E, XV
Stainless steel 17-4 PH -18 °C – +300 °C / -0 °F – +572 °F
Hard anti-stick coated stainless steel 17-4 PH -18 °C – +250 °C / -0 °F – +482 °F SLH, SLX
Titanium ASTM B265 Grade 2 -40 °C – +300 °C / -40 °F – +572 °F HPT
254 SMO stainless steel or equivalent -40 °C – +399 °C / -40 °F – +750 °F
Valve body guiding pad materials Service temperatures Standard field of use
Brass -125 °C – +200 °C / -193 °F – +392 °F
PEHD -150 °C – +80 °C / -238 °F – +176 °F MV DN 400 – 800, XV > DN 500
POM-C -40 °C – +100 °C / -40 °F – +212 °F D2G, JTV, MV DN ≥ 1200, RKO, SLH, SLX, WB > DN 700, WB14E, XV > DN 700
PTFE -80 °C – +260 °C / -112 °F – +500 °F HG > DN 250, HL, HP, HX, HPT, MV DN 900 – DN 1600
Valve body gasket materials Service temperatures Standard field of use
EPDM -25 °C – +120 °C / -13 °F – +248 °F WB > DN 700, WB14E > DN 350
FEPM -10 °C – + 180 °C / 14 °F – +356 °F WB14E > DN 350
FPM/FKM -15 °C – +180 °C / 5 °F – +356 °F HL, HG > DN 300, HP, HX > DN 350, JTV, MHE DN 800,
MV DN 900-DN 1600, RKO > DN 300, SLV DN 700-DN 900, SLF > DN 450, SLH > DN 350, SLX > DN 350, XV > DN 700
Graphite tape -50 °C – +550 °C / -58 °F – +1022 °F HG DN 50-DN 150, RKO DN 100-DN 250
NBR -25 °C – +100 °C / -13 °F – +212 °F WB > DN 700, WB14E > DN 350
PTFE -80 °C – +260 °C / -112 °F – +500 °F HG DN 200-DN 250, HPT, HX DN 150-DN 300, SLH < DN 300, SLX < DN 300
Seat materials Service temperatures Standard field of use
Brass -125 °C – +200 °C / -193 °F – +392 °F RKS
EPDM -25 °C – +120 °C / -13 °F – +248 °F MV, TV, SLV, SLF, SLH, SLX, WB, WB11, WB14, WB14E
FEPM -10 °C – + 180 °C / 14 °F – +356 °F WB11/ WB14 DN 50, DN 80-DN 300, WB14E DN 50-DN 600
FPM/FKM -15 °C – +180 °C / 5 °F – +356 °F MV
Natural rubber -25 °C – +80 °C / 5 °F – +176 °F SLF, SLH, SLV and SLX
NBR -25 °C – +100 °C / -13 °F – +212 °F MV, RKS, WB, WB11, WB14, WB14E
Polyurethane -25 °C – +90 °C / -13 °F – +194 °F HG, JTV, MV, RKO
PTFE with o-ring NBR -25 °C – +100 °C / -13 °F – +212 °F D2G, HG, HL, HP, HPT, HX, MV, RKO, TV, XV
PTFE with o-ring EPDM -25 °C – +120 °C / -13 °F – +248 °F D2G, HG, HL, HP, HPT, HX, MV, RKO, TV, XV
PTFE with o-ring FPM/FKM -15 °C – +180 °C / 5 °F – +356 °F D2G, HG, HL, HP, HPT, HX, MV, RKO, TV, XV
Stainless steel with grafoil tape -40 °C – +400 °C / -40 °F – +752 °F MV, HG
Stainless steel EN 1.4408 with o-ring NBR -25 °C – +100 °C / -13 °F – +212 °F MV, HG
Stainless steel EN 1.4408 with o-ring EPDM -25 °C – +120 °C / -13 °F – +248 °F MV, HG
Stainless steel EN 1.4408 with o-ring FKP/FKM -15 °C – +180 °C / 5 °F – +356 °F MV, HG
Box packing materials Service temperatures Standard field of use
Graphite (pH range: 2-13) -200 °C – +600 °C / -328 °F – +1112 °F
PTFE (pH range: 0-14) -80 °C – +260 °C / -112 °F – +500 °F
TwinPack (pH range: 2-13) -60 °C – +260 °C / -76°F – +500 °F All products
WhitePack (pH range: 2-13) -60 °C – +260 °C / -76 °F – +500 °F
Box packing scraper materials Service temperatures Standard field of use
Brass -125 °C – +200 °C / -193 °F – +392 °F
PEHD -30 °C – +80 °C / -22 °F – +176 °F MV DN 500-DN 800
PTFE -80 °C – +280 °C / -112 °F – +536 °F HX, WB14E
UHMW-PE -200 °C – +85 °C / -328 °F – +185 °F SLV, SLF, SLH, SLX, XV < DN 600, WB 350-DN 600,
WB11/WB14 DN 200-DN 300
Actuators Service temperatures Standard field of use
Auma SA actuators -30 °C – +70 °C / -22 °F – +158 °F All products
Auma GK bevel gears -25 °C – + 80 °C / -13 °F – +176 °F All products
CFP double-acting pneumatic cylinders -20 °C – +70 °C / -4 °F – +158 °F D2G & RKS
CFP single-acting pneumatic cylinders -20 °C – +70 °C / -4 °F – +158 °F
Ceson double-acting hydraulic cylinder -20 °C – +80 °C / -4 °F – +176 °F All products
Linak LA36 actuator unit -30°C – +65°C / -22 °F – +149 °F MV/WB11/WB14/WB14E < DN 300
Linak control unit +5°C – +40°C / -41 °F – +104 °F MV/WB11/WB14/WB14E < DN 300
RDC double-acting pneumatic cylinders -34 °C to 120 °C / -30 °F to 250 °F
RDC single-acting pneumatic cylinders -34 °C to 120 °C / -30 °F to 250 °F
SC double-acting pneumatic cylinders -30 °C – +100 °C / -22 °F – +212 °F All products except D2G & RKS