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2-way 2.5 in flanged butterfly valve


VFF1 2-way 2.5 in flanged butterfly valve

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Resilient seat in two-way valves, provide control for HVAC system applications including chilled water, hot water, cooling tower water, and thermal storage systems.

Product Specifications

Dimensions (in.)
Assembly--Length: 6 in.; Height: 12-7/8 in.; Width: 5-1/8 in.; Neck: 6 in.; Radius; 2-9/16 in.
Dimensions (mm)
Assembly--Length: 152 mm; Height: 327 mm; Width: 131 mm; Neck: 152 mm; Radius; 65 mm
Position indicator
Weight (lb)
15.9 lb
Weight (kg)
7.2 kg
ANSI Flanged
Shipping and Storage Temperature Range (F)
-40 F to 250 F
Shipping and Storage Temperature Range (C)
-40 C to 121 C
Ambient Temperature Range (F)
Actuator-- -40 F to 200 F
Ambient Temperature Range (C)
Actuator-- -40 C to 95 C
Connection Type
Body Pattern
2 way (S/R NO)
Pipe Size (inch)
2-1/2 in.
Pipe Size (DN)
Maximum Differential Pressure Ratings (Close-off) (psi)
175 psi
Maximum Differential Pressure Ratings (Close-off) (kPa)
1206 kPa
Capacity (Cv)
at 60 degrees stroke--107 Cv; at 90 degrees stroke--282 Cv
Capacity (Kv)
at 60 degrees stroke--93 kvs; at 90 degrees stroke--244 kvs
Valve Action
Normally Open
Valve Type
Controlled Fluid
Chilled or hot water with up to 50% Glycol. Not for use with steam or fuels.
Materials (Body)
Polyester-coated cast iron ASTM A126 Class B
Materials (Seat)
Peroxide-cured EPDM resilient seat
Materials (Stem)
416 Stainless Steel
Flow Characteristic
Modified Equal Percent
Pneumatic, 2-position, 80 psi spring return
Static Pressure Rating (psi)
250 psi Maximum
Static Pressure Rating (kPa)
1724 kPa Maximum
Flange Bolts
4, Flange Bolt Thread--5/8 in. -11 pitch
Materials (Plug/Ball/Disc)
Nylon 11-coated ductile iron (optional: Aluminum, bronze, and stainless steel)