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Honeywell VFF2 Two-way Control Butterfly Valves

Two-way Control Butterfly Valves
VFF2

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

 

 

 

 

 

 

 

 

Body Pattern: 2 way (NC, NC/NO; NSR)
Valve Action: Normally Closed, convertible to Normally Open with Spring Return actuator
Connection Type: Lugged
Controlled Medium: Chilled and hot water, up to 50% glycol
Flow Characteristic: Modified Equal Percent
Mounting: ANSI Flanged
Static Pressure Rating (max): 250 psi (1724 kPa)
Maximum Differential Pressure Ratings (Close-off): 175 psi (1206 kPa)
Actuator Ambient Temperature Ratings: -5 F to 140 F (-20 C to 60 C)
Temperature Range: -40 F to 250 F (-40 C to 121 C)
Number of Flange Bolts:
For 2 in., 2-1/2 in., 3 in. valves: 4
For 4 in., 5 in., 6 in., 8 in. valves: 8
For 10 in., 12 in., 14 in. valves: 12
For 16 in., 18 in., 20 in. valves: 16
20 in. valves: 20
Flange Bolt Thread
For 2 in., 2-1/2 in., 3 in., 4 in. valves: 5/8 in. -11 pitch
For 5 in., 6 in., 8 in. valves: 3/4 in. -10 pitch
For 10 in., 12 in. valves: 7/8 in. -9 pitch
For 14 in., 16 in., 18 in., 20 in. valves: 1-1/8 in.-7 pitch
Materials
Body: Polyester-coated cast iron ASTM A126 Class B
Stem: 416 stainless steel
Seat: Peroxide-cured EPDM resilient seat
Plug/Ball/Disc: Nylon 11-coated ductile iron
Approvals:
CE: Compliant
Underwriters Laboratories, Inc. C/US UL873, Plenum Rated


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