BS series fork-type quarter-turn pneumatic actuator can provide 90° rotation torque and provide the best torque curve for quarter-turn valves or dampers. It is suitable for a variety of occasions and ensures long-term operation on site.

-Complies with PED97/23/EC pressure vessel requirements.

-Has spring-return single-acting and spring-free double-acting structures.

-The modular design ensures the safety, convenience and economy of on-site maintenance.

-Meets IP66 and IP67M protection requirements, with excellent waterproof and anti-corrosion requirements.

-Adopts a standardized installation interface, the bottom connection meets the ISO5211 standard requirements, and the top output meets the NAMUR standard.

-The actuator meets SIL3 certification.

-Torque range up to 580000Nm

-Built-in tie rod

The built-in tie rod can ensure that the piston is always perpendicular to the inner wall of the cylinder, preventing the piston from deflecting due to air intake, and supports multiple points to prevent the piston plate from falling due to the gravity of the piston.

sag, thereby reducing wear. The built-in tie rod is not exposed to the air, which can avoid corrosion by corrosive gases, ensure the integrity of the air tightness of the cylinder, and avoid external mechanical impact.

-Guide sleeve design with built-in tie rod

A guide sleeve design is added between the piston tie rod and the piston, which can effectively avoid excessive wear of the sealing ring caused by friction.

-Safe piston seal

The piston sealing ring adopts a two-step design scheme, which can effectively avoid gas leakage and other faults.

-Various cylinder inner wall coating options

The cylinder inner wall coating has Xylan and chrome plating options, which can be selected according to the customer's on-site working conditions.

-Excellent piston rod design

Adopting advanced piston rod design, through modification and enhancement of relevant parts, it can effectively avoid piston rod breakage and other situations.

-Advanced guide block design

Able to effectively transmit lateral loads to the guide rod.

-Reliable top indicator lever

The top indicator rod is made of stainless steel and is connected to the shift fork through a pin. A guide sleeve and a sealing structure are added to ensure positioning accuracy and eliminate the need for limit switch/positioner connection.

side load on the shaft.

-Standard bottom flange

The bottom flange complies with ISO5211 design standards, has a stopper and a stop keyway, and can be designed in non-standard designs according to customer requirements.

-Two-way stroke adjustment

Bidirectional stroke adjustment can achieve ±5° adjustment, which helps ensure the installation of the valve and actuator and the sealing of the valve seat.

-Spring module locking mechanism

When the spring rod has pre-tightening force, it cannot be operated, which can ensure the safety of on-site operations.

-Optimized spring design

Years of design and application experience provide better spring selection.

Working pressure range: 3-14 Barg

Torque output

Single action: over 250000NM

Double action: over 580000NM

Working temperature:

Normal temperature type: -29℃ ~90℃

Low temperature type: -40℃ ~60℃

High temperature type: -20℃ ~170℃