Submittal Sheet

SPECIFICATION DATA
77-5260EF
® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
All Rights Reserved
VP525A,C
Pneumatic Radiator Valve
GENERAL
The VP525A,C Pneumatic Valves are normally-open, single-
seated valves with straight through or angle body construction.
They provide proportional control of two-pipe water or steam
systems. The VP525A is intended for control of water at a
maximum of 180°F (82°C). The VP525C is intended for hot
water or steam at a maximum of 240°F (116°C).
FEATURES
• Available in several capacities and spring ranges for
various application requirements.
• Easily replaceable actuator assembly for convenience
of service.
• Compact size for installation where space is limited.
• Male union outlet for easy piping.
SPECIFICATIONS
Models: See Table 1.
Dimensions: See Fig. 1.
Close-Off Ratings:
VP525A: See Fig. 2.
VP525C: See Fig. 3.
Construction:
Body: Cast Bronze.
Stem: Stainless steel, 3/16 in. (5 mm) diameter.
Packing: Teflon, spring loaded, self adjusting.
Disc and Plug:
VP525A: Rubber.
VP525C: Teflon and brass.
End Connections: NPT threaded inlet; male union outlet.
Flow Characteristics: Modified linear.
Body Pressure Rating (maximum): 150 psi (1034 kPa).
Spring Range in psi (kPa):
VP525A: 2-5 (14-34) and 3-10 (21-69).
VP525C:
Series 1: 3-10 (21-69).
Series 2: 3-10 (21-69); includes a loose 2-5 (14-34) spring.
Controlled Medium Temperature:
VP525A: 180°F (82°C) maximum.
VP525C: 240°F (116°C) maximum.
Maximum allowable difference for alternating hot and cold
water: 140°F (78K).