Specifications

17
Tech Support: 855-ONE-ZURN
www.zurn.com
• 1
1
/
4
”, 1
1
/
2
”, 2”, 2
1
/
2
”, 3”, 4”, 6”, 8”, 10”, 12”
• Standard spring range 15 to 150 psi, contact factory for other spring
range options
• Normally-open, direct-acting, diaphragm actuated, spring-loaded
pilots adjustable within a 10:1 ratio
• Ductile iron body and bonnet ASTM-A536 epoxy coated. Bronze
(ASTM B62) trim and pilots (standard)
• Single seated, diaphragm actuated, hydraulically operated, pilot con-
trolled
• Maximum temperature 180°F
• Pressure rated Class 150 250 psi max
Class 300 400 psi max
Threaded 400 psi max
• Globe configuration standard
• Angle configuration available (specify when ordering)
Model ZW109 150 lb flange
Model ZW109BP Supplied with a low flow by-pass
Model ZW109Y 300 lb flange (2” – 12”)
Model ZW109G Grooved (2
1
/
2
” – 8”)
Model ZW109TH Threaded (1
1
/
4
” – 3” only)
Model ZW109E Pressure reducing valve with solenoid shut off
valve
Model ZW109Q Pressure reducing and surge control valve
For Additional Information, reference WK-ACV catalog or visit
our web site.
OptionsTypical Installation Features Applications
In pressure reduction applications where high flow rates and/or constant downstream pressure are re-
quired, the ZW109 is up to the task. The ZW109 is a pilot operated pressure reducing valve designed
to reduce downstream pressure to a constant value, regardless of flow rate or inlet pressure fluctua-
tions. The ZW109 is ideal for commercial, industrial, and irrigation applications that cannot tolerate the
changes in pressure associated with direct acting pressure reducing valves.
Typical pressure reducing valve station using two Model ZW109 in parallel to handle a wide range of flow rates. Larger Model ZW109 valves takes
care of peak loads and smaller Model ZW109 handles low flows.
Pressure Reducing Valve – ZW109
Refer to Order Form on Web site
INLET PRESSURE
GAUGE
OUTLET PRESSURE
GAUGE
INLET SHUT-OFF OUTLET SHUT-OFF
PEAK LOAD VALVE
LOW FLOW VALVEINLET SHUT-OFF OUTLET SHUT-OFF
DIRECTION OF FLOW
Automatic Control Valves