Pneumatic Butterfly Valve (Metal seated) with Scotch Yoke Actuator

Pneumatic/hydraulic scotch yoke atuator

1. Size: DFA14 to DFA60
2. Working pressure: 3 to 8 bar
3. Switch angles: 0 to 90 deg; , ± 5 deg adjustable
4. Acting: Double acting; Spring return(single acting)
5. Certification: ATEX(TUV), CE
6. Suitable temperature:
Standard: -20~+80 centigrade
Low temperature: -40~+80 centigrade
High temperature: -15~+150 centigrade
7. Output torque:
Double acting: 1417 to 29164 NM
Single acting: 1700 to 9725 NM

8. Modular Versatility:
Pneumatic Power Module,
Hydraulic Power Module or Override for Hydaulic Actuators,
Pneumatic Power Module with Extended Travel Stops,
Spring exchangeable,
Spring Module with Patented Adjustable Output Torque and Integral Override gear operator,
Hydraulic Power Module or Override for Hydaulic Actuators Module,
Pneumatic Power Modul,
Spring Module with Patented Adjustable Output Torque,
Spring Module with Patented Adjustable Output Torque and Integral Override Hydraulic Cylinder

9. Distinguished Characteristics:

(1)Patented spring module: Output torque adjustable, Springs replaceable fit different type of valve's torque.

(2)Corrosion Resistan:
The DFA series actuators incorporate over three stages of internal and external coatings to resist severe weather, chemical and petroleum environments. The inner surface of cylinder is coated by PTFE, enhanced corrosion resistant and self-lubricating.

(3)Modular Design:
DFA series actuators have available, field-serviceable drive, power, spring and override modules, the modules are removable, serviceable and interchangeable when mounted to the valve. Modules are available for separate purchase to reduce spare parts inventory.

(4)Safe Spring Module:
To ensure the safety of personnel during installlation and maintenance, the spring module has been designed so that it can only be removed from the power module with the spring in the fully extended position. This prevents accidental release of the spring force, protecting personnel from injury and the actuator from accidental damage.

(5)Water Ingress Protected:
O-rings are fitted on bodies, caps and so on, this ensure water ingress protected.

(6)ISO Valve Mounting:
The DFA Series actuators interface meets ISO standard, and meets the dimensional
Requirements of ISO defined for each torque range.

(7)Standardization:
The shaft driven accessory interface conforms to NUMAR and is identical on all DFA Series, allowing standardization of accessory mounting hardware and installation practices.

(8)Wear Resistant:
The guide rod and piston rod have an advanced surface treatment, which combined with
Self-lubricating bearings, provides superior wear resistance and extends the life of all sliding components.

(9)High Efficiency:
The piston rod and guide block connection superior surface finishes and self-lubricating bearings maximize input energy transfer directly to the valve stem, efficiency is further enhanced by the tension-loaded spring, minimizing radial loads on the piston rod.

(10)Precompressed spring unit:
Precompressed spring unit easy to exchange, to ensure safe operation.

(11)Replaceable Bearings:
Replaceable Bearings protect sliding and rotation components, with suitability for either dry or lubricated working conditions.

(12)Hydraulic Overrides for Spring Module:
Inside hydraulic override cylinder module for spring-return models does not increase actuator length.

(13)PTFE Guide Ring:
Guide ring, made of PTFE, prevents metal to metal contact with the cylinder bore, protect the cylinder from being scratched by pistons.

(14)Roller:
Roller used reduce the friction between the yoke arm and pin, minimizing the wear of yoke arm and pin.

(15)80° -100° Traval Adjustment:
Bi-Directional Travel Stops integral to the actuator, the stops allow 80° -100° Total travel adjustment.