Honeywell VP512 Catalog Page

Pneumatic Valves

M18956B

BLP WITH 3 TO 8 PSI (21 TO 55 kPa) SPRING RANGE

BLP WITH 6 TO 11 PSI (41 TO 76 kPa) SPRING RANGE

PRESSURE DROP ACROSS VALVE IN PSI (kPa)

8 (55)

9 (62)

10 (69)

12 (83)

11 (76)

13 (90)

0

(0)10(69)

30

(207)

50

(345)

70

(483)

150

(1034)

110

(758)

15 (103)

14 (97)

12 (83)

11 (76)

13 (90)

15 (103)

16 (110)

17 (117)

14 (97)

140

(965)

20

(138)

40

(276)

60

(414)

90

(621)

80

(552)

100

(689)

120

(827)

130

(896)

CLOSE-OFF RATINGS AT VARIOUS BRANCH LINE PRESSURES

C

V

= 16.0

C

V

= 0.63 to 2.5

C

V

= 10.0

C

V

= 6 3

C

V

= 4 0

VP512 Unit Vent Pneumatic Control Valve

A normally open, single seated, straight-through or angle globe
valve used for proportional control of steam or hot water in unit
ventilator applications. Replacement devices are available for
Johnson, Powers, Robertshaw, Barber-Colman, and older
Honeywell devices.

• Equal percentage, high lift throttling guide provides accurate control
over wide load variations.

• Molded replaceable composition disc for tight shut-off.

• Replaceable brass seat.

• Self-adjusting, spring-loaded Teflon® packing.
Back-seating allows repacking without shutting down or draining system.

•

• Rotatable actuator for aligning air connection with control air piping.

• Integral union connection to simplify installation and service.

Valve Type: Globe Valve
Body Pressure: 150 psi
Air Connections: Dual barbed for 5/32 in. or 1/4 in. plastic tubing
Valve Action: Proportional Normally Open
Controlled Medium: Steam; Water
Type of End Connection: Outlet - External NPT Union;

Inlet - Internal NPT

Operating Humidity Range (% RH): 5 to 95% RH
Temperature Range: For Water: 115 F to 240 F; For

Steam: 212 F to 275 F

Maximum Temperature Differential: For Water: 140 F
Maximum Actuator Temperature: 160 F
Maximum Diaphragm Pressure: 25 psi (172 kPa)

End Connection
Size Capacity

Product Number

Close-off
Ratings at
Branch Line
Pressure

VP512A1726/U 1 in. 25 mm 10 Cv 8.57 Kv 78 psi at 13 psi 3 psi to 8 psi 21 kPa to 55 kPa Two-way, Straight-through

VP512A1742/U 1 in. 25 mm 10 Cv 8.57 Kv 78 psi at 13 psi 3 psi to 8 psi 21 kPa to 55 kPa Two-way, Right Angle

VP512A1767/U 1 1/4 in. 32 mm 16 Cv 13.7 Kv 40 psi at 13 psi 3 psi to 8 psi 21 kPa to 55 kPa Two-way, Straight-through

VP512A1783/U 1 1/4 in. 32 mm 16 Cv 13.7 Kv 40 psi at 13 psi 3 psi to 8 psi 21 kPa to 55 kPa Two-way, Right Angle

Close-off Ratings at various Branchline Pressures

Accessories:

312817AA-Actuator Assembly, 3 to 8 psi, 21 to 55 kPa, and 1/2 in.

stroke.

312817AB-Actuator Assembly, 6 to 11 psi, 41 to 76 kPa and 1/2 in.
stroke.

Replacement Parts:

14002863-001-Valve rebuild kit for 3/4 to 1 1/4 in valves with Cv of 6.3 or

10

Spring Range

Body Pattern(inch) (mm) (Cv) (Kv) (psi) (kPa)

Pneumatic

Controls

70-6910 711