CAT.No.CIA004E-4

Most Suitable for Automating
Existing Manual Valves

PNEUMATIC VALVE ACTUATOR

dnaefaeSlbaiRelSide handle type

Applicable valves● Gate valve

Top handle type

● Globe valve● Ball valve● Butterfly valve, etc.

■ Existing manual valves can easily be automated while being on the line.
■ Most suitable to use as emergency shutoff valve (subject to the Fire Service Act).
■ Existing manual valves can remotely be operated from the office.
■ Even in a case of power failure, can be operated by securing air-supply.
■ Work of automation and mounting are easy.
■ By applying the mechanical torque-limiter, valves are not damaged.
■ Help saving energy !
■ Can easily be mounted in hazardous area (all pneumatic type).

Air switch box

Features
1. An advanced, compact and lightweight valve actuator that readily mounts on an existing manual valve to retrofit it for
automatic control. (Accommodates valves 2" to 40" in bore size, or larger.)
2. Constructed by plain gears treated with induction hardening process for virtually wear-free gear teeth, our proprietary
torque limitter which serves to maintain consistent shutoff torque is a standard feature and safeguards the valve
against damage by overtightening, while it ensures smooth opening and closing movement.
3. The air motor is of field proven vane type for quiet and smooth☆What is the torque limiter?
rotation.
Our torque limiter is a mechanism designed for the purpose of
4. A dedicated manual handle allows manual operation in caseclosing the valve at consistent, proper torque.
(Patented No. 1993887)
of emergency. (The manual handle remains locked in position
Using a spring-balance arrangement, it accurately detects
to prevent movement during automatic operation, thus affordvalve's shutoff torque and, when a preset torque is reached, itstops the air motor.
ing protection to the operator.)
The design therefore eliminates such complaints as valve over5. Component parts are unitized to facillitate modification,tightening or inoperative valve that has been shut off, characterized by most desirable performance for the valve with increased
maintenance and inspection.
safety and service life.
6. With the addition of a potentiometer, a valve position indicator
Shutoff torque adjustment is also simple in the field.
output is also available.

● Specifications
Model

VTC-15 (Low torque type)

VTC-25 (High torque type)

Shutoff torqueN·m

40 to 250

150 to 400

Opening torque

N·m

400

Item600

No. of Open-Close Revolutions rev
Supply air pressure
Air Consumption
Connection
Dia.

Set to 85 to 95% of total revolutions of target valve
0.40 (0.35 to 0.70)

MPa
L/min (normal)

Drive Tubing

Rc

Signal Tubing

Rc680

1100

3/8

1/2
1/8

Housing Material

Aluminum casting

FinishMunsell 7.5G7/2.5

Operating Temperature Range
Weight−10 to +60℃kg2729● Relationship of torque and rotational speed
Model

VTC-15 (Low torque type)

VTC-25 (High torque type)

Speed reduction type

A speed reduction

E speed reduction

A speed reduction

D speed reduction

E speed reduction

Shutoff Torque [N·m]

40 to 250

40 to 100

150 to 400

60 to 100

100 to 200

Open Torque [N·m]

400

200

600

200

400

Rotational Speed [rpm]2340

239040※The rotational speed indicated above is based on the supply air pressure of 0.4MPa supplied to the V-Torq Ⅱ. Depending on the magnitude ofload torque or individual product difference, the rotational speed may vary by about 10%.

Installation Procedures■ Installation on top※: Most typical installation is shown here.

2■ Installation on side

● Outline Dimensions
VTC-15: Rc3/8
VTC-25: Rc1/2

Drive air supply connection (Lower)φ A dimension: φ300 mm for 6B or less and78

shutoff torque of 100N·m or less142

A

φ360 mm if exceeding the above conditions

70
φ250

φB dimension: 426 mm for VTC-15
444 mm for VTC-25※ Becomes 10mm lower during manual operation.

(B)

C dimension: 355 mm

220

D dimension: 120 mm for VTC-15
166 mm for VTC-25＊Only operation method type A is equipped with
Open/Stop/Close switch.
Open, stop, closeoperate switch

230

117

125

278

112

105

Rc1/8
(Signal air supplyconnection)

12117
260

(C)
(D)

※

143

169
250

129
Rc1/8
(Top handle type)(Used for remote controlled type)(operation signal input/answer signal output)(Side handle type)※ Manual handle has a 6-to-1 reduction ratio.

Operating Principle■ All pneumatic type
Opens and closes the valve with the air switch box locatedremotely from V-Torq Ⅱ. (Intermediate stop possible.)

Air switch box(SB-031)◆ Two tubing for operate signals
Full close signal "1": Full close "0": Others
Full open signal "1": Full open "0": Others(If intermediate stop is not required, single tubingsuffices.)◆ Two tubing for answerback signals
Full close signal "1": Full close "0": Others
Full open signal "1": Full open "0": Others(If specified for full close or full open only, single
tubing suffices.)◆ With the addition of pressure switches,full close and full open indicators can be provided
in the control room.

Three-piece set

Stop valve(Open/close indicator lamps provided)■ Remote control with solenoid valve typeAir switch box(SB-021)

Can control the entire system from control room orin the field by using a local/remote selector equipped
air switch box with the addition of pressure switches
Solenoid valvesand solenoid valves.
Control room
(Intermediate stop possible.)Three-piece set

Open Close

Stop valve

Operation switch
Indicator lamps

Air tubing (drive)
Air tubing (signal)
Control cablePressure switches(Open/close indicator air lamps provided)※ Local/remote selectable type※: Examples of selectable operations are shown.

3

● Product Code Explanation
ItermModel

Product codeDescription① ② ③ − ④ ⑤ ⑥ − ⑦ ⑧ ⑨ − ⑩ ⑪ − ⑫ ⑬V

Valve actuator

TType

CV-Torq Ⅱ−

Air motor type1

5For low torque (4AM)

25For high torque (6AM)
All pneumatic local type: the valve is opened/closed by the switch directly
installed on body. (Intermediate stop possible)

Operating method (※1)

Valve bore size

A−B−C−E−Remote control type (hold during power failure)
The valve is opened/closed by operation of two solenoid valves. (Status signal: Intermediate stop possible)

H−

Remote control type (hold during power failure)
The valve is opened/closed by operation of two solenoid valves. (Pulse signal: Intermediate stop not possible)

P−

Operating method E + Valve opening signal (resistance value) output from potentiometer unit to control roomZ−

All pneumatic remote type: the valve is opened/closed via the air switch box.
Remote control type (fully closed or fully open during power failure)
The valve is opened/closed by operation of one solenoid valve. (Status signal: Intermediate stop not possible)

Special

※V-Torq Ⅱ Manual handle type※

Indicated in inch (Ex.: 4B→04)
T−S−

Top handle
Side handle
Standard (Dial type)S

Indicator type

option (Pointer type) (The number of revolutions cannot be changed.)O

Speed reduction ratio

External operating signalA−

A reductionD−

D reduction (Not selectable for VTC-15)

E−

E reduction

Z−

Special0

Not req'd (The switch on V-Torq II is used for opening/closing) Operation "A"

1

Close sig. only. Sig. "1": Valve close Sig. "0": Valve open Operation "B," "C"2Open sig. only. Sig. "1": Valve open Sig. "1": Valve open Operation "B," "C"3

2 open/close input (status sig.) intermed. stop - Yes Operation "B," "E," "P"4

2 open/close input (pulse sig. ※ 0.3s min.) intermed. stop - No Operation "B," "H"Special9External output signal

0None

1

Full close signal only2

Full open signal only

3

Full close, full open signal

4Analog output (pot. output)

59Analog output (pot. output) + full close, full open signal
Special※1: In all operating methods, the answer signal (air signal) for fully open and fully closed can be output.
Electric signal when required is available via a (separately installed) pressure switch.
※2: If you have any question about analog output, contact us.

Installation Examples☆Automated remote fire extinghishingequipment☆Automated reaction tank-bottom valve(special installation)☆Automated marine shipping and receiving
valves

The specification as of December, 2022 is stated in this catalog. Specifications and design are subject to change without notice.

3-10-8 Kamiochiai, Shinjuku-ku, Tokyo 161-8508, Japan
Phone: 81-3-3360-5121 FAX: 81-3-3365-8605

https://www.oval.co.jp/en/0903 2212 0903S