Masoneilan™ Type 87/88 Pneumatic Spring-Diaphragm Actuators

The Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators are highly reliable and versatile actuators engineered for a wide range of globe control valve applications in industrial environments. Designed with precision and durability in mind, these actuators deliver consistent mechanical spring fail-safe operation, ensuring optimal performance and safety in demanding process control conditions.

One of the main advantages of the Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators is their adaptability across different pressure drop scenarios, from low to high, making them a preferred choice for industries such as power generation, refining, petrochemicals, and oil & gas operations. With the ability to incorporate manual override for precise mechanical valve positioning, operators can maintain control and efficiency even during critical system adjustments.

These actuators are built to perform in challenging industrial applications. In power generation, they are commonly found in steam turbine generators, condenser systems, cooling towers, turbine buildings, and reactor facilities. In refining and petrochemical sectors, they are essential for processes such as distillation, hydroprocessing, reforming, cracking, blending, and quenching. Their robust design allows them to handle the demanding conditions of midstream and upstream oil & gas operations, including pipeline integrity management, dehydration, liquefaction, and regasification.

The Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators also offer outstanding flexibility in installation and integration with various control valve systems. Their simple yet effective pneumatic spring-diaphragm mechanism ensures low maintenance requirements while delivering high reliability over long service periods. This reduces operational downtime and minimizes lifecycle costs, which is a key consideration for industrial operators.

In addition, the actuator’s ability to maintain performance under high temperature and pressure conditions makes it ideal for balance-of-plant operations, gas turbine control, and heat recovery steam generator applications. Whether in auxiliary systems, separation units, refrigeration processes, or liquefied natural gas (LNG) handling, these actuators deliver stable, precise control that meets stringent safety and efficiency standards.

With a proven track record of performance, ease of operation, and maintenance-free reliability, the Masoneilan Type 87/88 Pneumatic Spring-Diaphragm Actuators remain a trusted solution for process control in complex and demanding industries.