美国Posi-flate气动执行器工作原理
Posi-flate Tork-Mate™气动执行器890系列
Posi-flate气动执行器890系列高达15,000,000 次循环...
美国Posi-flate新一代Tork-Mate 890系列长寿命气动执行器 成功达到1.5千万次循环，Tork-Mate 890系列执行器可以方便的用于90°与180°转换装置中，如：蝶阀，球阀，带插销阀，节气闸阀并满足了NAMUR标准。
Advantages
The Tork-Mate 890 series extended life actuators are ideal for the operation of 90° turn devices such as butterfly valves, ball valves, plug valves, damper valves and other devices. Tork-Mate pneumatic actuators have features that are unique, providing many benefits to the user looking for worry-free service.
TMHC 2324
A proprietary two-step hardcoat process that offers superior protecion on interior and exterior housing surfaces. TMHC 2324 also ensures maximum life from the piston seals, piston bearings and heel bearings.
NAMUR Mounting
Tork-Mate 890 series actuators meet the latest NAMUR standards, allowing direct or close coupling of NAMUR designed accessories. The pinion interface features a positive, international standard drive for positioners, switches and other accessories. The solenoid interface allows direct acceptance of any NAMUR designed control valves.
Modular
Easily removable end caps and modular spring packs simplify the conversion from double-acting to spring-return configurations.
Travel Adjustment
The Tork-Mate 890 series actuators feature pinion travel stops that allow a full +/-10° of valve travel adjustment. As an option, extended stroke adjustment screws can be added for inexpensive throttling applications.
Extended Cycle Life
Special piston seals provide greatly extended life compared to standard O-ring actuators. All other bearings, seals and components have been engineered to provide superior and extended service lives.
Blow-out Proof Pinion Gear
In addition to the stainless steel pinion retaining ring, the Tork-Mate 890 series actuators feature a unique internal safety bar.
Operating Ranges
Tork-Mate 890 series double-acting actuators produce guaranteed minimum torque outputs up to 17,466 inch pounds (1973 Nm).
Custom Options
These include Viton? seals, high temperature trim up to 250° F (121° C), special finishes, stainless steel pinions, special mounting configurations and special coupling configurations.  美国Posi-flate气动执行器工作原理