The Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators are used in a wide range of globe control valve applications. Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators is Low to high-pressure drop applications; Mechanical spring fail-safe operation; Manual override to mechanically position valve. The 87/88 Series is a pneumatic spring diaphragm actuator. The multiple spring design configuration provides four standard spring ranges that are achieved by varying spring quantity and placement. A molded rolling diaphragm and deep cases reduce area change, resulting in a linear relationship between travel and air pressure.
The Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators are used in a wide range of globe control valve applications. Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators is Low to high-pressure drop applications; Mechanical spring fail-safe operation; Manual override to mechanically position valve. The 87/88 Series is a pneumatic spring diaphragm actuator. The multiple spring design configuration provides four standard spring ranges that are achieved by varying spring quantity and placement. A molded rolling diaphragm and deep cases reduce area change, resulting in a linear relationship between travel and air pressure.
Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators have the following features:
Lifting type valve cage
Noise reduction valve cage
Linear or isometric properties
The cage guide
Non-equilibrium, standard equilibrium, and pilot equilibrium
Process connections RFF, RTJ, and BWE
The temperature reached 565 degrees
Applicable to high temperature, high-pressure conditions
The current estimated useful life period for the 87-88 Series Actuator is 25+ years. To maximize the useful life of the product, it is essential to conduct annual inspections, routine maintenance, and ensure proper installation to avoid any unintended stresses on the product. The specific operating conditions will also impact the useful life of the product. Consult the factory for guidance on specific applications if required prior to installation.
The Model 87/88 actuator is designed to accept 1/4″ NPT air supply connections. Accessories supplied with the actuator are mounted and connected at the factory.
| Actuator Size |
Diaphragm Effective Area | Stem Travel | Max Supply | |||
| sq. in. | sq. cm. | inches | mm | psi | bar | |
| 6 | 60 | 387 | 0.8 | 20 | 60 | 4.1 |
| 10 | 100 | 645 | 0.8 / 1.5 | 20 / 38 | 60 | 4.1 |
| 16 | 160 | 1032 | 0.8 / 1.5 / 2.0 / 2.5 | 20 / 38 / 50 / 63 | 60 | 4.1 |
| 23 | 230 | 1484 | 0.8 / 1.5 / 2.0 / 2.5 | 20 / 38 / 50 / 63 | 60 | 4.1 |
| 23L | 230 | 1484 | 3.0 / 3.5 / 4.0 | 76 / 89 / 102 | 60 | 4.1 |
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