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Engineering
G-9
Close-off Pressures
Control Valves
Selection and Sizing
Electronic High Pressure Close-off
Valve Size
in. (mm)
Electro-Hydraulic 24 VAC
SKD SKC
Normally Open
2-1/2 (65) 200 (1378) —
3 (80) 200 (1378) —
4 (100) — 200 (1378)
5 (125) — 200 (1378)
6 (150) — 200 (1378)
Normally Closed
2-1/2 (65) 200 (1378) —
3 (80) 200 (1378) —
4 (100) — 200 (1378)
5 (125) — 200 (1378)
6 (150) — 200 (1378)
Table Notes:
All close-off values within table are in psi (kPa) unless otherwise indicated.
Electronic
Valve Size
in. (mm)
Rack & Pinion w/GMA Rack & Pinion w/GCA
APC
298, 299
SAX NSR
APC
371, 373
SKD
APC
267, 274-276
SKB
APC
289-291
SKC
APC
292-294
Normally Open
1/2 (15) 250 (1724) 250 (1724) 250 (1724) 250 (1724) 250 (1724) —
3/4 (20) 174 (1200) 231 (1593) 211 (1456) 250 (1724) 250 (1724) —
1 (25) 136 (938) 149 (1028) 137 (945) 201 (1386) 250 (1724) —
1-1/4 (32) 84 (580) 92 (634) 85 (586) 124 (855) 250 (1724) —
1-1/2 (40) 55 (380) 59 (407) 55 (379) 80 (552) 250 (1724) —
2 (50) 30 (207) 36 (248) 34 (235) 49 (338) 201 (1386) —
2-1/2 (65) — 25 (172) 26 (179) 38 (262) 153 (518) —
3 (80) — 18 (124) 17 (117) 25 (172) 101 (342) —
4 (100) — — — — — 65 (448)
5 (125) — — — — — 42 (289)
6 (150) — — — — — 29 (199)
Normally Closed
1/2 (15) 250 (1724) 250 (1724) 250 (1724) 250 (1724) 250 (1724) —
3/4 (20) 174 (1200) 250 (1724) 250 (1724) 250 (1724) 250 (1724) —
1 (25) 136 (938) 173 (1193) 159 (1097) 203 (1400) 250 (1724) —
1-1/4 (32) 84 (580) 100 (690) 92 (634) 117 (807) 250 (1724) —
1-1/2 (40) 55 (380) 61 (421) 57 (393) 73 (503) 208 (1434) —
2 (50) 30 (207) 37 (255) 35 (241) 44 (303) 126 (869) —
2-1/2 (65) — 25 (172) 26 (179) 34 (234) 97 (668) —
3 (80) — 18 (124) 17 (117) 22 (152) 63 (434) —
4 (100) — — — — — 39 (268)
5 (125) — — — — — 25 (172)
6 (150) — — — — — 17 (117)
Table Notes:
All close-off values within table are in psi (kPa) unless otherwise indicated.