Scotch Yoke Pneumatic Actuator

Introduction to the BHF Series Scotch Yoke Pneumatic Actuator

Core Design & Function

The BHF Series Scotch Yoke Pneumatic Actuator is a precision-engineered angular stroke drive system from Hengchun Actuator, a trusted China-based manufacturer. Built with a premium fork-slider transmission mechanism, this actuator efficiently converts piston linear motion into rotary output (90°±1°), delivering backlash-free performance critical for industrial valve control. Engineered for reliability, it serves as the ideal power source for ball valves, butterfly valves, and air dampers, with a torque range spanning 40N·m to 50,000N·m (with reduction gear) – making it a top choice for high-torque applications in demanding industries.

Key Advantages of the BHF Series

High Torque Output for Heavy-Duty Needs

The BHF Series stands out with its exceptional torque capacity, from 40N·m (standard) to 50,000N·m (max with reduction gear). This strength eliminates operational failures in large-diameter valve systems, reducing downtime in oil & gas pipelines, power plants, and chemical facilities. Its rigid locking design ensures precise positioning, a must for critical process control.

Versatile Modes & Safety Compliance

Offering both spring-return (single-acting) and double-acting configurations, the actuator meets emergency shut-off (ESD) requirements – a vital feature for hazardous environments. The spring-return model automatically resets valves during air supply loss, ensuring regulatory compliance in petrochemical and thermal power applications. Optional Exd II BT4/CT4 explosion-proof rating further expands its use in explosive zones.

Extreme Environment Adaptability

With a customizable operating temperature range (-40℃~+120℃) and IP65/IP67 protection grade, the BHF Series performs reliably in arctic oil fields, high-temperature workshops, and wet industrial settings. High-quality materials (QT450 ductile iron cylinder, FKM seals) resist corrosion and wear, supporting ≥50,000 opening-closing cycles under rated load.

Technical Specifications & Quality Assurance

Critical Performance Parameters

Key specs include a rated operating pressure of 0.4-0.8MPa (0.6MPa standard), leak-proof design (≤(3+0.15D)cm³/min for back pressure side), and compliance with GB/T 12223 (flange) and GB/T 7306.1/2 (air port thread) standards. Standard accessories (opening indicator, manual mechanism) enable quick installation.

Certifications & Reliability

Backed by ISO 9001:2015 certification, the BHF Series undergoes rigorous testing (1.5×rated pressure for 3min, no leakage). It comes with an 18-month warranty, and Hengchun’s strict quality control ensures consistent performance across every unit.

Industrial Applications & Use Cases

The BHF Series Scotch Yoke Pneumatic Actuator excels in:

• Oil & Gas: ESD valves, pipeline ball valves

• Power Generation: Boiler dampers, steam control valves

• Water Treatment: Large-diameter butterfly valves

• Chemical: Explosion-proof valve actuation in reactors

It seamlessly pairs with ball valves (DN50-DN1200) and butterfly valves (DN100-DN2000), adapting to diverse industrial control systems.

FAQ & Quick Reference

What is the delivery lead time for standard models?

25-30 working days; expedited production is available for urgent orders.

Can the actuator be customized?

Yes – choose torque, temperature range, explosion-proof grade, and optional accessories (solenoid valve, positioner).

What is the service life?

≥50,000 cycles under rated load, ensuring long-term cost savings.