Product introduction I
overview of pneumatic double position butterfly valve dqsw2
Pneumatic double position butterfly valve is an actuator that uses piston actuator to realize valve opening and closing and its opening
It is suitable for metallurgy, petroleum, chemical industry and boiler industries
The combustion system of industrial furnace is used as an actuator to control the air volume and realize automatic control under various heating conditions
Pneumatic double position butterfly valve is especially suitable for occasions with large diameter, large flow and low pressure difference
It not only has the advantages of conventional pneumatic butterfly valve, but also has the following unique characteristics:
1
The valve opening can be within 0— 35°、 35°& mdash; 90° The opening of the two sections can be adjusted arbitrarily within the range of the two sections
The opening of the two sections does not interfere with each other
The adjustment is simple and the display is intuitive
2
The valve has high positioning accuracy, good repeatability, and is not affected by the fluctuation of air supply pressure
The control of air supply pressure can be arbitrarily selected within the specified range
3
Compared with pneumatic diaphragm butterfly valve, this valve also has the characteristics of simple control system, few supporting parts, compact structure and light weight
Therefore, the whole system is cheap and is an ideal actuator to replace pneumatic diaphragm butterfly valve
2、 Structure and principle of pneumatic double position butterfly valve dqsw2
Pneumatic double position butterfly valve is composed of pneumatic actuator and butterfly valve
The pneumatic actuator consists of a single acting cylinder and a pilot solenoid valve
It is controlled by the pilot solenoid valve to realize the opening and closing of the valve
A set of piston limit adjusting mechanism is set in the cylinder to adjust the stroke of the piston, so as to realize the adjustable opening of the valve
Butterfly valve is composed of valve body, valve plate, rotating shaft, connecting rod, etc
it converts the stroke position of piston rod into the opening of valve plate
And the actual opening value is directly read out by the pointer display device
An insulating layer is arranged at the connection between the valve body and the cylinder support to reduce the heat transfer to the cylinder
3、 Main technical parameters of pneumatic double position butterfly valve dqsw2
See table (I)
2
Specification code
1、 Type code
SW & mdash; Indicates two bits DW & mdash; Unit of representation
2、 Specification code
Butterfly Valve Specification
| | | | | — one
| — two
| — three
| — four
| — five
|
nominal diameter (DN)
| 50
| 65
| 80
| 125
| 100
| 150
| 175
| 200
| 250
|
3、 Installation method and accessory code
A & mdash; Indicates vertical installation mode B & mdash; Indicates horizontal installation mode T & mdash; Indicates the attached air source triplet
G & mdash; Indicates with radiator C & mdash; Indicates high temperature type Add support rod between bracket and valve body
(400 ℃ plus 100mm 500 ℃ plus 200mm)
4、 Marking example
DQSW2 & mdash; 3BT refers to the second improved level with air source triplet, diameter ￠ 175
Pneumatic two position butterfly valve installed
nominal diameter
| 100mm
| 125 mm
| 150mm
| 200mm
| 250mm
|
working pressure
| 0
1MPa
|
control pressure
| 0
25～0
6MPa
|
working media
| gas
|
ambient temperature
| -5℃～± 50℃
|
opening adjustment range
| 0～30° 30° ～ 75° 0～75°
|
power supply conditions
| AC220V 50HZ
|
overall dimensions
| 412*270*143
| 504*369*143
| 540*382*143
| 540*382*143
| 488*481*150
|
connecting flange bolt hole
| 4 holes
Φ 18*Φ one hundred and seventy
| 4 holes
Φ 18*Φ two hundred and twenty-five
| 4 holes
Φ 18*Φ two hundred and twenty-five
| 4 holes
Φ 18*Φ two hundred and eighty
| 4 holes
Φ 18*Φ three hundred and thirty-five
|
valve body thickness (b)
| 46
| 46
| 46
| 46
| 46
|
4、 Difference between dqsw2 and dqsw2 of pneumatic two position butterfly valve
The cylinder body of dqsw2 pneumatic double position butterfly valve is made of cast iron, while the cylinder body of dqsw2 is made of aluminum alloy pipes with hard chromium plating on the surface and honing process on the inner surface, so that the cylinder body has the advantages of light weight, beautiful appearance and durability
At the same time, the small air regulation of dqsw2 pneumatic double position butterfly valve is simple and intuitive, and both are effective
The dqsw pneumatic double position butterfly valve needs to loosen * tighten the four screws of the pressing plate, and then adjust the adjusting rod
Because the piston is not fixed radially, when the adjusting rod and the rear piston are loosely matched, the adjusting rod may rotate with the rear piston when the adjusting rod is rotated, and the adjusting rod cannot move axially, thus losing the function of adjusting small air
5、 Pneumatic double position butterfly valve dqsw2 special supply
In order to meet the needs of special users, the company has also developed dqsw3 pneumatic three position butterfly valve and dqsw1 pneumatic single electric control two position butterfly valve
The pneumatic three position butterfly valve is divided into three types of wind, i
e
strong wind, stroke and light wind, with the maximum opening of 90 DEG 65°、 35°， It is controlled by three pilot solenoid valves
Wind stroke and small wind are the air volume required by the burning nozzle, and the strong wind is the air used to cool the workpiece, which meets the specific process, and the cooling curve also needs to be controlled
The small air opening of dqsw1 pneumatic single electric control two position butterfly valve is 0— 35° Adjustable and normally open; Gale 35 DEG& mdash; 90° Adjustable within the range
6、 Installation and use of pneumatic double position butterfly valve dqsw2
1
The valve should be installed in a place with clean environment and a certain space, and attention should be paid to keep the pilot solenoid valve in an upright position
2
The valve has been equipped with a set of flared connectors (interface z1/8 ", nut m14× 1
5) at the air source inlet, and the user shall provide ￠ 8× 1 red copper introduces the air source
3
The control air source introduced into the valve shall be equipped with a pneumatic three piece device, and the pressure of the air source shall be controlled within the range of 0
25~0
6mpa
4
The control air pressure shall be selected within the specified range according to the user's conditions, so as to ensure that the cylinder piston can be pushed
5
The pilot solenoid valve is normally closed and is energized to open the valve
The pilot valve body is equipped with manual control rotating shafts
In case of sudden power failure, the manual emergency opening and closing can be realized by rotating the rotating shaft 900
At ordinary times, the groove of the rotating shaft should be horizontal
6
The adjustment of piston stroke is completed by the adjusting mechanism
Different working conditions require different limit adjustment mechanisms
When adjusting the large opening, loosen the adjusting nut first, then rotate the adjusting nut to the required position, and then lock it
When adjusting the small opening, first loosen the set screw under the support, and then rotate the knurled nut or adjusting rod to the required position
7
All the dynamic and static seals of the cylinder adopt standard O-ring, with a specification of 50× 3
5、26× 2
4、14× 2
4 use
Users can spare parts by themselves
8
When ordering, users should make correct selection according to whether their pipeline installation form is horizontal pipeline or vertical pipeline
7、 Troubleshooting of pneumatic double position butterfly valve dqsw2
fault phenomenon
| fault cause
| exclusion method
|
the valve does not act after the coil is energized
| the control solenoid valve coil is burnt out
|
Contacts
- Company Name
- Shanghai qianshun automatic control valve Co., Ltd
- Name:
- Mr. Liang Shuai
- Q Q
- 1211671412
- Telephone
- 0577-66988800
- Mobile
- 18057726700
Address
- Operational Address
- Wuxing Industrial Zone, Oubei Town, Yongjia County, Wenzhou City, Zhejiang Province
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