PNEUMATIC DIAPHRAGM ROTARY ACTUATOR
SINGLE ACTING TYPE
The “DB” rotary stem motion type diaphragm actuator, with single-spring design, offers dependable, high thrust performance in a compact, lightweight package. It obtains a required rotary output by converting a linear output into a rotation force through the scotch yoke construction. The linear output is created by balancing two forces.
The type “DB” is a yokeless, direct-acting diaphragm actuator for either throttling or on-off service. Principle applications include operation of butterfly and segmental ball valves, damper, and other similar equipment.
FEATURES
- · Application flexibility
- Actuator is available with fail-open of fail-closed construction and can be mounted in any of four actuator-valve mounting positions. Actuator can be mounted on a broad range of control valves or on other equipment.
- · Mounting versatility
- Four tapped holes in the actuator base permits either bracket or plate mounting.
- · Long stroke
- Deep casings provide up to 95mm or maximum travel (in a size DB520 actuator).
- · Application versatility
- Wide spring selection is available for nearly any control application. Spring selection procedure is quick and accurate.
- · Safety
- Actuator-valve linkage is completely enclosed, yet the valve packing adjustment remains accessible without removing any parts.
SPECIFICATION
| Type |
Single acting (Spring return) |
| Action |
Rotating direction of the driving shaft is shown in the direction facing the actuated part from the actuator part. |
| Actuator Model |
DB270 |
DB360 |
DB430 |
DB520 |
| Effective Diaphragm Area (cm²) |
238 |
373 |
660.5 |
1320 |
| Materials |
Case |
AL. Alloy (casting) |
| Diaphragm |
Cloth reinforced chloroprene rubber, N.B.R. or ※EPDM |
| Shaft (output rod) |
SUS304 (Hcr plated) |
| Linkage |
AL. Alloy (casting) |
Supply Air Pressure
kPa (kgf/cm²G) |
160 (1.6), 320 (3.2) |
Spring Range
kPa (kgf/cm²G) |
60 ~ 100 (0.6 ~ 1.0)
120 ~ 200 (1.2 ~ 2.0) |
| Output shaft rotation |
0° ~ 60°, 0° ~ 90° |
| Air Connection |
Rc 1/4 |
Rc 3/8 |
| Ambient Temperature |
-20°C ~ +70°C (※-50°C ~ -20°C, +70°C ~ +100°C) |
Additional
Options |
Mechanisms |
Top-mounted H/W, Top worm-mounted H/W,Travel stopper. |
| Accessories |
E/P Positioner, P/P Positioner, Pressure regulator, Limit S/W,
Solenoid valve, Booster relay, Speed controller, Lock-up valve, etc. |
[Notes]
(1) ※: Manufactured and attached as according to customer’s order.
(2) Without positioner, the performance may vary according to the combination with valve body and kind of packing.
(3) Please consent in advance that approval drawing and other documents may represent with old material designation.
(4) For ambient temperature, denoted the extended temperature range as option.
DOCUMENTS & DRAWINGS
