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Siemens Resilient Seat Butterfly Valve Assemblies
Available in two-way and floating arrangements for twoposition (On/Off), floating and modulating control, Resilient Seat Butterfly Valve Assemblies provide bubble-tight shutoff for the assemblies’ full-rated pressure.
• Molded-in resilient seat provides bubble-tight shutoff to 150 psi
• Operating temperature up to 250°F (120°C)
• Lugged body is drilled and tapped for isolation and removal of downstream piping at full-rated pressure
• Round, polished disc and hub edge provides 360 degree concentric seating, minimum flow restriction, lower torques and longer seat life
• Upper and lower inboard bronze bearings ensure longer service life with low operating torques
• Thru-stem design provides high strength and positive disc control with standardized end connection for operator interchangeability
• Extended neck allows adequate clearance for flanges and insulation
• Bi-directional, select adjusting stem seat is suitable for vacuum and pressure while preventing external contamination of the stem area
• Heavy-duty corrosion resistant top bushing, absorbs actuator side thrust
• Cast-in top plate is an integral part of the body and is standardized to allow direct mounting of actuators
• Each valve is factory tested to 110 percent of specified pressure rating
• Available in multiple configurations to match jobsite needs.
| Valve Size: | 2 to 20" (51 to 508 mm) |
| Body Style: | Butterfly |
| Assembly Type: | 2-way/3-way |
| Materials: | |
| Body: | Cast Iron |
| Disc: | 316 Stainless Steel |
| Stem: | 416 Stainless Steel (Full Cut Disc 2 to 12"/Under Cut Disc 2 to 6") 316 Stainless Steel (Full Cut Disc 14 to 20"/Under Cut Disc 8 to 20") |
| Seat: | EPDM |
| Bearing: | Bronze (Full Cut Disc 2 to 12"/Under Cut Disc 2 to 6") Sintered Metal (Full Cut Disc 14 to 20"/Under Cut Disc 8 to 20") |
| Upper Stem Bushing: | Polyester |
| Upper Stem Seal: | NBR |
| Controlled Medium: |
Chilled Water, Hot Water |
| Temperatures: | -40 to +250°F (-40 to +121°C) |
| Close-off Ratings: | Refer to Selection Tables |
| Table 1 | Table 2 | Table 3 | Table 4 | Table 5 | Table 6 | Table 7 | Table 8 | Table 9 | Table 10 |
| XXXX | XX | X | XX | X | X | X | X | X | X |
| Table 1 | Assembly Configuration |
| BV2W | 2-way |
| BV3W | 3-way |
| Table 2 | Valve Size |
| 02 | 2-inch |
| 25 | 2.5-inch |
| 03 | 3-inch |
| 16 | 16-inch |
| 18 | 18-inch |
| 20 | 20-inch |
| Table 3 | Disc Type |
| F | Full Cut Disc - 150 psi Shut off |
| U | Under Cut Disc 100 psi tight shutoff 2-6" 50 psi tight shutoff 8"+ |
| Table 4 | Actuator Type |
| S2 | Pneumatic Spring Return 30 psi |
| S6 | Pneumatic Spring Return 60 psi |
| D6 | Pneumatic Double Acting 60 psi |
| E2 | Electric 2-position/Floating, 24-240 Vac/Vdc |
| EM | Electric Modulating 0-10 Vdc, 24-240 Vac/Vdc |
| EP | Electric Modulating 4.20 mA, 24-240 Vac/Vdc |
| G1 | Electric Spring Return, On/Off, 120 Vac |
| G2 | Electric Spring Return, On/Off, 24 Vac |
| G3 | Electric Spring Return, Floating, 24 Vac |
| G4 | Electric Spring Return, Modulating 0-10 V, 24 Vac |
| G5 | Electric Spring Return, Modulating 4.20 mA, 24 Vac |
| G6 | Electric Floating, 24 Vac |
| G7 | Electric Modulating 0-10 Vdc, 24 Vac |
| G8 | Electric Modulating 4.20 mA, 24 Vac |
| Table 5 | Valve Body Style |
| L | Lug-cast Iron (Standard) |
| Table 6 | Fail Position/Assembly Configuration |
| O | Fail Open 2-way Spring Return |
| C | Fail Closed 2-way Spring Return |
| N | 2-way Non-spring Return |
| A-D | 3-way Spring Return |
| A-D | 3-way Non-Spring Return |
| Table 7 | Actuator Accessories/Options |
| P | Pneumatic Positioner, 30 psi Actuator |
| Q | Pneumatic Positioner, 60 psi Actuator,SR |
| R | Pneumatic Positioner, 60 psi Actuator,DA |
| T | E/P Valve, 120 Vac, 30 psi SR Actuator |
| U | E/P Valve, 24 Vac, 30 psi SR Actuator |
| V | E/P Valve, 120 Vac, 60 psi SR Actuator |
| W | E/P Valve, 24 Vac, 60 psi SR Actuator |
| Y | E/P Valve, 120 Vac, 60 psi DA Actuator |
| Z | E/P Valve, 24 Vac, 60 psi DA Actuator |
| X | Not Used |
| Table 8 | Actuator Type |
| S | Limit (End) Switch for S2, S6, D6 Actuators (Non-std) |
| A | Limit (End) Switch for G1, G2, G4, G5, G7, and G8 Actuators (Non-std) |
| X | Not Used |
| Table 9 | Heater |
| H | Heater (must be used with EM and EP, opt. with E2) |
| X | Not Used |
| Table 10 | Manual Override |
| M | Manual Override for S2, S6 & D6 (non-Std) (Pneumatic actuator only) |
| X | Not Used |
