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Series-WE20
Butterfly Valves with Cartridge Seat for Low Torque Seal, Gas/Liquid Control
- Cartridge-style seat design ensures low torque operation and easier service vs traditional dovetail seats
- Available in wafer or lug body styles (2″-12″) with EPDM or PTFE liners for broad fluid compatibility
- Suitable for manual, electric or pneumatic actuation configurations-highly configurable for your control needs
- Dual flange patterns (ANSI Class 125 & 150) with extended neck for insulation-designed for both shut-off and throttling applications
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Product Overview
The Series WE20 butterfly valve from Dwyer delivers a high-performance, configurable solution for fluid control across a wide range of liquids, gases and steam. With line sizes from 2″ up to 12″ and a choice of wafer or lug body styles, the WE20 is engineered for flexibility in installation and service.
A standout feature is the cartridge-style seat design (phenolic-backed with EPDM or PTFE liner options), which reduces installation complexity and increases longevity by avoiding typical “dovetail seat” retention issues. The body is offered in ductile iron (standard) with 316 SS disc and 410 SS stem, delivering robust durability for demanding applications.
For actuation, the WE20 is fully configurable - choose manual operation, electric actuator (two-position or modulating), or pneumatic options (double-acting or spring-return) to match control architecture. Its wafer or lug connection format supports ANSI Class 125/150 flange compatibility, making it suitable for retrofit or new systems.
The extended neck design accommodates insulation wrap without needing custom extensions and enables clean installation in HVAC, process, or utility systems. With temperature limits from -50 °F to 300 °F depending on liner and material, the WE20 performs across diverse environments.
Whether deployed for throttling service or full shut-off, the WE20 offers a compact footprint, adaptable configuration, and service-friendly design-making it an excellent choice for engineers specifying versatile butterfly valves in modular or high-volume applications.
Show Ratings & Reviews
WE20-X-X-XXX-OPT WE20 ELECTRIC BUTTERFLY VALVE
1ST SYMBOL (1ST X) RANGE
ATD02 2 IN ELECTRIC TWO-POSITION
BTD02 2-1/2 IN ELECTRIC TWO-POSITION
CTD02 3 IN ELECTRIC TWO-POSITION
DTD03 4 IN ELECTRIC TWO-POSITION
ETD04 5 IN ELECTRIC TWO-POSITION
FTD04 6 IN ELECTRIC TWO-POSITION
GTD05 8 IN ELECTRIC TWO-POSITION
HTD06 10 IN ELECTRIC TWO-POSITION
ITD07 12 IN ELECTRIC TWO-POSITION
AMD02 2 IN ELECTRIC MODULATING
BMD02 2-1/2 IN ELECTRIC MODULATING
CMD02 3 IN ELECTRIC MODULATING
DMD03 4 IN ELECTRIC MODULATING
EMD04 5 IN ELECTRIC MODULATING
FMD04 6 IN ELECTRIC MODULATING
GMD05 8 IN ELECTRIC MODULATING
HMD06 10 IN ELECTRIC MODULATING
IMD07 12 IN ELECTRIC MODULATING
ATH03 2 IN EXP ELECTRIC TWO-POSITION
BTH03 2-1/2 IN EXP ELECTRIC TWO-POSITION
CTH05 3 IN EXP ELECTRIC TWO-POSITION
DTH05 4 IN EXP ELECTRIC TWO-POSITION
ETH06 5 IN EXP ELECTRIC TWO-POSITION
FTH08 6 IN EXP ELECTRIC TWO-POSITION
GTH09 8 IN EXP ELECTRIC TWO-POSITION
HTH10 10 IN EXP ELECTRIC TWO-POSITION
ITH11 12 IN EXP ELECTRIC TWO-POSITION
AMH03 2 IN EXP ELECTRIC MODULATING
BMH03 2-1/2 IN EXP ELECTRIC MODULATING
CMH05 3 IN EXP ELECTRIC MODULATING
DMH05 4 IN EXP ELECTRIC MODULATING
EMH06 5 IN EXP ELECTRIC MODULATING
FMH08 6 IN EXP ELECTRIC MODULATING
GMH09 8 IN EXP ELECTRIC MODULATING
HMH10 10 IN EXP ELECTRIC MODULATING
IMH11 12 IN EXP ELECTRIC MODULATING
2ND SYMBOL (2ND X) BODY TYPE AND LINER OF BUTTERFLY VALVE
WE WAFER EPDM
WP WAFTER PTFE
LE LUG EPDM
LP LUG PTFE
3RD SYMBOL (3RD X) ACTUATOR VOLTAGE (ELECTRIC ACTUATORS)
N NO SOLENOID
A 110 VAC
B 220 VAC
C 24 VAC
D 24 VDC
WE20-X-X-XXX-OPT WE20 PNEUMATIC BUTTERFLY VALVE
1ST SYMBOL (1ST X) RANGE
AHD00 2 IN HAND OPERATED
BHD00 2-1/2 IN HAND OPERATED
CHD00 3 IN HAND OPERATED
DHD00 4 IN HAND OPERATED
EHD00 5 IN HAND OPERATED
FHD00 6 IN HAND OPERATED
GHD00 8 IN HAND OPERATED
HHD00 10 IN HAND OPERATED
IHD00 12 IN HAND OPERATED
ADA03 2 IN DOUBLE ACTING
BDA03 2-1/2 IN DOUBLE ACTING
CDA04 3 IN DOUBLE ACTING
DDA05 4 IN DOUBLE ACTING
EDA06 5 IN DOUBLE ACTING
FDA07 6 IN DOUBLE ACTING
GDA08 8 IN DOUBLE ACTING
HDA09 10 IN DOUBLE ACTING
IDA11 12 IN DOUBLE ACTING
ASR04 2 IN SPRING RETURN
BSR04 2-1/2 IN SPRING RETURN
CSR06 3 IN SPRING RETURN
DSR07 4 IN SPRING RETURN
ESR08 5 IN SPRING RETURN
FSR09 6 IN SPRING RETURN
GSR10 8 IN SPRING RETURN
HSR11 10 IN SPRING RETURN
ISR11 12 IN SPRING RETURN
2ND SYMBOL (2ND X) BODY TYPE AND LINER OF BUTTERFLY VALVE
WE WAFER EPDM
WP WAFTER PTFE
LE LUG EPDM
LP LUG PTFE
3RD SYMBOL (3RD X) SOLENOID (PNEUMATIC ACTUATOR ONLY)
N NO SOLENOID
A NEMA 4X NAMUR SOLENOID
4TH SYMBOL (4TH X) SOLENOID VOLTAGE (PNEUMATIC ACTUATOR ONLY)
NO SYMBOL FOR ELECTRIC ACTUATORS
N NO SOLENOID
A 110 VAC
B 220 VAC
C 24 VAC
D 24 VDC
E 12 VDC
OPTIONS (OPT) (PNEUMATIC ACTUATORS ONLY)
-NO FAIL OPEN SPRING RETURN ACTUATOR