PA Series Spur Gear Actuators: Effortless & Precise Manual Valve Operation

The PA Series is a specialized line of spur gear actuators designed for valves that generate significant axial thrust, such as Gate Valves and Globe Valves. With an optimized design, this series makes opening and closing heavy industrial valves easy and smooth via manual handwheel operation.

Key Highlights of the PA Series

1. “Hammer Blow” Mechanism – Secure Valve Seating

A standout feature of the PA Series is the intelligent Hammer Blow mechanism. This design significantly reduces the torque required during the initial opening or final closing stages, ensuring the valve is completely sealed without excessive physical effort.

2. Superior Durability with Sealed Construction

• Ready for Operation: The units feature a perfectly sealed structure and come pre-filled with high-pressure grease from the factory, providing corrosion resistance and friction reduction immediately upon installation.

• High Efficiency: Ball Bearings are equipped at all rotational support points, which not only extends service life but also maximizes transmission efficiency.

3. Smart Design for Easy Maintenance

• Two-Piece Drive Nut: Utilizes an involute spline connection between the drive nut and the drive sleeve. This design allows technicians to remove the nut for stem thread machining without dismantling the entire actuator, significantly saving maintenance time.

• Flexible Installation: Through the use of a Mounting Adapter, the PA Series can be easily installed on new valve systems or retrofitted onto existing valves at the job site.

Advanced Optional Versions

To meet modern monitoring requirements, Nippon Gear offers additional variants:

• PA-OP Series: Integrated with an intuitive Mechanical Dial Position Indicator (MDPI).

• PA-OS Series: Integrated with both an MDPI and Limit Switches to provide status signal feedback to the control center.

PA Series Technical Specifications

Ideal Applications

The PA Series is an effective solution for augmenting manual power in:

• Water Pumping and Drainage Stations.

• Chemical and Petrochemical Plants (operating large gate valves).

• Industrial Steam and Hot Water Piping Systems.