Temperature guidelines
Temperature guidelines for materials and actuators
The following material and actuator temperatures can be used as guidelines to define minimum and maximum temperatures for the knife gate valve components. Please feel free to contact us at Stafsjö (sales@stafsjo.se) for advice on recommended operating temperatures for different valve types, sizes and configurations.
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Temperature guidelines
| Valve body/retainer ring materials | Temperature range | 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 | Temperature range | 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 | Temperature range | 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 | Temperature range | 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 | Temperature range | 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 | Temperature range | 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 | Temperature range | 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 | Temperature range | 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 |
