User Guide

Flowrite VF 599 Series Three-Way Valves Technical Instructions
Document Number 155-185P25
April 9, 2007
Siemens Building Technologies, Inc. Page 7
Table 5. Maximum Available Close-off Pressures for Pneumatic Actuators, Action, Upper Port.
10 to 15 psi (69 to 103 kPa)spring range
4-inch Actuator 8-inch Actuator 12-inch Actuator
Valve Size
Inch (mm)
0 psi (0 kPa) 0 psi (0 kPa) 0 psi (0 kPa)
1/2 (15) 236 (1627) 250 (1724) —
3/4 (20) 155 (1069) 250 (1724) —
1 (25) 91 (627) 250 (1724) 250 (1724)
1-1/4 (32) 52 (359) 148 (1020) 250 (1724)
1-1/2 (40) 32 (331) 92 (634) 250 (1724)
NC (Upper port)
2 (50) 20 (138) 55 (379) 185 (1776)
Table 6. Maximum Available Close-off Pressures for Pneumatic Actuators, Action, Bottom Port.
3 to 8 psi (21 to 55 kPa) spring range
4-inch Actuator 8-inch Actuator 12-inch Actuator
Valve Size
Inch (mm)
15 psi (103 kPa) 15 psi (103 kPa) 30 psi (207 kPa) 15 psi 30 psi
1/2 (15) 142 (979) 250 (1724)
250 (1724) — —
3/4 (20) 80 (552) 231 (1593)
250 (1724) — —
1 (25) 52 (359) 150 (1034)
250 (1724) 250 (1724) 250 (1724)
1-1/4 (32) 32 (221) 93 (641)
250 (1724) 250 (1724)
250 (1724)
1-1/2 (40) 20 (138) 60 (414) 198 (1365) 250 (1724)
250 (1724)
NO (Bottom port)
2 (50) 12 (83) 37 (255) 123 (848) 130 (896)
250 (1724)
Table 7. Close-off Pressures for Electronic Actuators.
Valve
Size
SKB SKD SQX
El/Mech
Low Force
Rack &
Pinion
Valve
Action
Inch (mm) psi (kPa) psi (kPa) psi (kPa) psi (kPa) psi (kPa)
1/2 (15) 250 (1724) 250 (1724) 250 (1724) 250 (1724) 250 (1724)
3/4 (20) 250 (1724) 250 (1724) 221 (1524) 238 (1640) 250 (1724)
1 (25) 250 (1724) 203 (1400) 130 (896) 140 (965) 173 (1193)
1-1/4 (32) 250 (1724) 117 (807) 75 (517) 81 (558) 100 (690)
1-1/2 (40) 208 (1334) 73 (503) 46 (317) 50 (345) 61 (421)
NC
2 (50) 126 (869) 44 (303) 28 (193) 31 (214) 37 (255)
1/2 (15) 250 (1724) 250 (1724) 250 (1724) 250 (1724) 250 (1724)
3/4 (20) 250 (1724) 250 (1724) 173 (1193) 186 (1282) 231 (1593)
1 (25) 250 (1724) 201 (1386) 112 (772) 121 (834) 149 (1028)
1-1/4 (32) 250 (1724) 124 (855) 69 (476) 75 (517) 92 (634)
1-1/2 (40) 250 (1724) 80 (552) 44 (303) 48 (331) 59 (407)
NO
2 (50) 201 (1386) 49 (338) 27 (186) 30 (207) 36 (248)