Air-to-Lower
|
Air-to-Raise
|
SPECIFICATIONS
Air Supply Connection: 1/4" NPT.
Temperature Limit: 150°F (66°C).
Materials of Construction:
Diaphragm: Molded Buna-N rubber, nylon reinforced.
Diaphragm Support Plate: Plated steel.
Spring: Plated spring steel.
Push Rod: Plated cold rolled steel.
Housing: Drawn steel with baked enamel finish.
Yoke: Cast iron with baked enamel finish.
Spring Adjustment: Plated cold rolled steel, ball thrust bearing.
CAUTION: Use of an actuator supply gas other than air can create a hazardous
environment because a small amount
of gas continuously vents to atmosphere.
STANDARD SPRING SPECIFICATIONS
| Part No. |
K LBF/In. (DGF/mm) |
Fmax LBF (KGF) |
Color Code |
Used in Term. Nos. |
| 11P376 |
100 (1.79) |
315 (143) |
WHITE-YELLOW |
220, 221
230, 231
|
| 11P377 |
180 (3.21) |
448 (203) |
WHITE-RED |
| 11P378 |
260 (4.64) |
572 (259) |
WHITE-BLUE |
| 11P379 |
350 (6.25) |
870 (395) |
WHITE-BROWN |
| 11P381 |
450 (8.04) |
963 (437) |
WHITE-GREEN |
| 11P382 |
560 (10.00) |
1180 (535) |
WHITE-ORANGE |
| 11P383 |
680 (12.14) |
1530 (694) |
WHITE-BLACK |
| 11P384 |
820 (14.64) |
1435 (651) |
WHITE-WHITE |
| 11P356 |
1000 (17.86) |
1500 (680) |
BROWN-BROWN |
| 11P901 |
1250 (22.32) |
1875 (850) |
BROWN-GREEN |
221 & 223 |
| 11P385 |
100 (1.79) |
368 (167) |
YELLOW-RED |
222, 223, & 233 |
| 11P386 |
180 (3.21) |
600 (272) |
YELLOW-BLUE |
| 11P387 |
260 (4.64) |
847 (384) |
YELLOW-BROWN |
| 11P388 |
350 (6.25) |
1050 (476) |
YELLOW-GREEN |
| 11P389 |
450 (8.04) |
1150 (522) |
YELLOW-ORANGE |
| 11P391 |
560 (10.00) |
1210 (549) |
YELLOW-BLACK |
| 11P392 |
680 (12.14) |
1500 (680) |
YELLOW-YELLOW |
| 11P902 |
820 (14.64) |
1645 (746) |
BROWN-ORANGE |
223 & 233 |
| 11P903 |
1000 (17.86) |
2630 (1193) |
BROWN-BLACK |
| 11P904 |
1300 (23.22) |
2460 (1116) |
PURPLE-WHITE |
- Select Air-to-Raise (Lower) actuator based on control (valve) action
and fail-safe condition requirements.
- Select minimum actuator size based on stroke, pneumatic control signal
and maximum deliverable force requirements.
- Select spring based on stroke (T), pneumatic control range (typically,
P1 = 3 psi and P2 = 15 psi), pre-load (typically,
pressure drop x unbalanced area of plug ΔP x AP) and
maximum allowable spring force (Fmax).
K= ((P2 x Ae2) - (P1 x Ae1) - ΔP
x AP)/T
Fmax. > (Pl x Ae1) + (K x T) + [(ΔP
x AP) on air-to-open systems only]. |
