2
The instructions hereunder are for long-lasting service of T-DYNAMO (hereinafter "this
product") without loss or hazard.
Please read this manual thoroughly before use in order to ensure correct use of the product.
Separate information for the safety precautions for handling valves should also be observed.
a
a
b
b
Port A
Port B
Cover⑥
Case①
Parallel pin㉜
Piston packing㉔
Cover⑦
Piston⑤
Piston⑤
Shaft②
Yoke③
Parallel pin㉜
Spring㊷
Piston⑤
Shaft②Cover⑥
Piston⑤
Spring㊷
Port C
PortB
b
b
a
a
Cover⑦Yoke③
FOR YOUR SAFE USAGE
The following instructions should always be followed.
WARNING
This mark indicates "possibility of death or serious injury".
This mark indicates items that "you must not do".
This mark indicates items "you must do".
CAUTION
■ We will indicate the following marks for your attention. (The following are examples of marks.)
Introduction
● Be sure to read this instruction manual before transportation, storage, piping installation, operation, and mainte-
nance and inspection.
● This instruction manual does not describe all the assumed conditions on transportation, storage, piping installa-
tion, operation, maintenance and inspection of this product. If there are any questions, please contact our sales
department.
● Reference values and limit values for operation, maintenance, and inspection specified in this instruction manual
have been determined in consideration of maintenance management of this product. This product should be used
within the range of the reference values and the limit values.
● This product should be used by connecting only to a valve with an opening/closing angle of 90 degrees or less.
● Be sure to store this instruction manual in a readily accessible place for future reference after installation and
operation start. If a staff in charge is changed, information on the storage place of the instruction manual and
operation should be communicated to the next staff.
● If dents or scratches are made on impact, stop using the product for safety and replace the product.
＊ Details of this instruction manual are subject to change without notice.
1-1 Product features
■ Double-acting type cylinder
(1) The cylinder space which is enclosed by the case ① and the
covers ⑥ and ⑦ is divided into airtight chambers ⓐ and ⓑ
by the pistons ⑤ and the piston packing ㉔.
(2) The shaft
②
penetrates the chamber
ⓑ
of the case. The yoke
③
is
fitted in the hole across the shaft in such a way that it allows it to slide
in the hole. The top of the yoke is connected with the parallel pins
㉜
so it rotates in accordance with the movement of the pistons.
(3) The compressed air enters chamber ⓐ through port A and
pushes the pistons. The air in chamber ⓑ is exhausted through
port B as the pistons move due to a pressure difference
between the two chambers. Integrated with these pistons, the
parallel pins ㉜ also move and torque in the shaft is generated.
■ Single-acting type cylinder
(1) The cylinder space which is enclosed by the case ① and the
covers ⑥ and ⑦ is divided into airtight chambers ⓐ and ⓑ
by the pistons ⑤ and the piston packing ㉔.
(2) The shaft ② penetrates the chamber ⓑ of the case. The yoke
③ is fitted in the hole across the shaft in such a way that it
allows it to slide in the hole. The top of the yoke is connected
with the parallel pins ㉜ so it rotates in accordance with the
movement of the pistons.
(3) The compressed air enters chamber ⓑ through port B and
pushes the pistons. The air in chamber ⓐ is exhausted
through port C as the pistons ⑤ move and the spring ㊷ is
squeezed due to a pressure difference between the two
chambers. Integrated with these pistons ⑤, the parallel pins
㉜ also move and torque in the shaft is generated.
(4) When air supply to Port B is stopped, the pistons are pushed
back due to the force of the spring ㊷ and torque in the shaft
is generated.
1-2 Operating principle
This product is a pneumatic rotary actuator driven by pneumatic pressure of 0.4 to 0.7 MPa for the purpose of
actuating a 90˚ butterfly valve. The case is of aluminum alloy which is fabricated by means of extrusion. This manu-
facturing method enables the cylinder to be light weight, compact in design and highly accurate. The attachment
installation member complies with the NAMUR standard. NAMUR standard attachment parts can be installed directly.
1. PRODUCT FEATURES
Piston movement
Air flow
Double-acting type cylinder
Single-acting type cylinder
■ We will indicate level of danger or damage caused by neglecting these cautions as the
following:
This mark indicates "possibility of injury to personnel or physical
damage only".
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