Model BW series - Temperature Control Valves Brochure

Return-Temperature Control Valves BW KALORIMATFeatures of the BW series¦ Direct acting proportional controller for maintaining constant return temperatures.¦ Used for regulating large heating systems and tracing systems, or for the temperature control of individual heat exchangers (washing baths, chemical and galvanic baths).¦ The valve prevents short-circuiting and automatically balances large systems.¦ Straight-through valve with balanced valve sleeve. Closing temperature set at our works.¦ Valves with external setting device available on request.ApplicationBW 31 for hot waterBW 31 A for thermal oilsBW 31, DN 15–25 mmExternal setting devicefor BW 31End Connections and Overall Lengths LType ConnectionsOverall length L [mm]DN 15 DN 20 DN 25 DN 401/2" 3/4" 1" 11/2"BW 31 Flanged EN PN 25 150 150 160 200Flanged ASME 150 150 150 160 200Screwed sockets 95 95 95 –BW 31A Flanged EN PN 25 150 150 160 200Flanged ASME 150 150 150 160 200Screwed sockets 95 95 95 –SpecificationBW 31 PN 40Material 1.0460 (P250GH / C 22.8) / ASTM A105Size (DN) 15, 20, 25Connection Flanged to EN PN 40Service pressure PMA [bar] 40 37.3 30.2 25.8 23.1Inlet temperature TMA [°C] 20 100 200 300 400BW 31 PN 25Material 1.0460 (P250GH / C 22.8) / ASTM A105Size (DN) 40Connection Flanged to EN PN 25Service pressure PMA [bar] 25 23.3 19.4 16.1 14.4Inlet temperature TMA [°C] 20 100 200 300 400BW 31A PN 40Material 1.0460 (P250GH / C 22.8) / ASTM A105Size (DN) 15, 20, 25Connection Flanged to EN PN 40Service pressure PMA [bar] 40 37.3 30.2 25.8 23.1Inlet temperature TMA [°C] 20 100 200 300 400BW 31A PN 25Material 1.0460 (P250GH / C 22.8) / ASTM A105Size (DN) 40Connection Flanged to EN PN 25Service pressure PMA [bar] 25 23.3 19.4 16.1 14.4Inlet temperature TMA [°C] 20 100 200 300 400Admissible differential pressure (upstream pressure 6 minus downstream pressure) ? PMX [bar]Setting devicefor BW 31ALA4-A8Return-Temperature Control Valves BW KALORIMATAdjustable closing temperatures (without external setting device)Adjustable closing temperatures (with external setting device)?t = temperature difference in Kelvin [K] between closing temperature (temperature at which the valve is closed) and return temperature. Capacity ChartsBW 31, DN 152) BW 31, DN 20 and 252)BW 31, DN 402) Adjustable range DN 15 mm DN 20 mm DN 25 mm DN 40 mm Type 1/2" 3/4" 1" 11/2" BW 31 60 °C - 130 °C 40 °C - 115 °C 40 °C - 115 °C 50 °C - 110 °CBW 31A 120 °C - 270 °C 100 °C - 280 °C 100 °C - 280 °C 100 °C - 270 °CBW 31 60 °C - 130 °C 40 °C - 115 °C 40 °C - 115 °C 50 °C - 110 °CBW 31A 90 °C - 270 °C 70 °C - 270 °C 70 °C - 270 °C 70 °C - 270 °C2) For capacity chart BW 31 A see data sheet.