Overview of Primary Product

Technical Instructions Powermite Two-Way Flared Valves Normally Open/Normally Closed
Document No. 155-311P25
March 7, 2005
Page 2 Siemens Industry, Inc.
Specifications, Con’t
Stem travel 1/4-inch (6.3 mm)
Valve body rating ANSI 250. See Table 6.
Material
Body and seat Bronze
Stem Stainless steel
Packing EP rubber quad ring
Operating
Controlled medium Water, steam, ethylene glycol solution
Maximum medium temperature 250°F (121°C)
Maximum medium inlet pressure
Water See Table 6.
Steam 15 psig (103 kPa)
Maximum recommended differential pressure for modulating service
Water 20 psig (138 kPa)
Steam 15 psig (103 kPa)
Close-off
Normally Closed See Figure 1.
Normally Open See Figure 1.
Flow characteristic Modified equal percentage
Actuator
Nominal spring range
NC 10 to 15 psi (69 to 103 kPa)
NO 3 to 8 psi (21 to 55 kPa)
Diaphragm
Effective area 3.4 inch
2
(22 cm
2
)
Ambient temperature range 30 to 160°F (-1 to 71°C)
Maximum air supply to the diaphragm 30 psig (207 kPa)
Material Silicone rubber
Miscellaneous
Dimensions See Figures 2 and 3.
Weight 2.2 lb (1kg)
Service Kits
Diaphragm replacement kit (package of 5) 656-736
Repack kit (for 6 valves) 656-601
Rebuild/repack kit
NO 656-761
NC models 2 and 3 656-014
NC discontinued model 1 656-763
Shut off disc kit (package of 10)
NO 656-740
NC 656-800
Replacement top NO only
Cv 0.9 656-830
Cv 2.1 656-599