不锈钢设计、对称扭矩特性
BIFFI MORIN S SERIES ACTUATORS
DESIGNED WITH A HEART OF STAINLESS STEEL
Stainless steel yoke
The heart of any scotch yoke actuator is the yoke. S series actuators use 17-4PH stainless for this
critical area as standard.
The yoke is the mechanism used to convert linear force to torque. This area is most often where
the life of the actuator is controlled.
Principles of construction
Using high quality materials of construction and modern rugged design concepts provides the
standard for high quality, low cost valve actuation.
The S actuator housings are all machined from 316 stainless steel castings. This produces a
rugged, low cost product through reduced machining time and by eliminating wasteful excess
material.
Any components that rotate or slide during operation, such as the high strength stainless steel
output shaft, stainless steel piston rod, stainless steel thrust pin or the stainless steel piston, are
all supported by replaceable friction reducing bearings.
Bi-directional travel stops
Adjustable stops on each end cap provide the flexibility of accurate valve rotation positioning at the
end of the open and close' stroke. Both stops are located on the cylinder centerline, the optimal
position to maximize travel adjustment and eliminate any detrimental side loading on the travel
stops. Adjustable from 82° to 98°.
Ingress protection
Standard IP66. Optional IPé8.
Spring designed for safety
All spring return models incorporate a ‘man-safe’ spring design that allows the actuator to be
safely assembled and disassembled inthe field without the need for special tools. The integral tie
rods are bored and tapped to provide a means of loading and unloading the spring in a safe and
convenient manner.
SYMMETRICAL SCOTCH YOKE TORQUE CHARACTERISTICS
SINGLE ACTING SPRING RETUR DOUBLE ACTING AIR TO AIR
125— 1257
i Air break ngrreiga Break torque
100 — 100
Air stroke ifigig
Zé 75— / 75
S
= 50 ” 50 了
的 Airend 7
25 25
TITTTITIT T o 而 I I T
2 45° 90° 0° 45° 90°
Stroke Stroke
0
AVAILABLE OPTIONS
¢ Jackscrew override
e Hydraulic override
o Full stroke adjustment
¢ Proximity preparation
e Lockout device
* Partial stroke test
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