bellows gate valve

bellows gate valve
  • sell:021-32051999
  • sell:021-32050777
  • fax:021-66099555

Details

  • Product Introduction
  • Service Promise
  • Ordering Process

The stem of WZ41H bellows gate valve adopts double sealing structure of bellows and packing to ensure leak-free sealing at the stem. It is especially suitable for inflammable, explosive, toxic and valuable medium pipelines. Bellows seal structure design is reasonable, fatigue resistance, long service life.


Bellows gate valves are suitable for cutting off or connecting pipeline media in petroleum, chemical, pharmaceutical, chemical fertilizer and power industries with nominal pressure PN1.6-16MPa and working temperature - 29-350 C.


Product features


1. Bellows seal gate valve, its key component metal bellows, lower end and stem assembly using automatic rolling welding, upper end and connecting plate automatic rolling welding, in the fluid medium and air between the formation of a metal barrier to ensure no leakage valve stem.


2. The disc adopts conical design, and the sealing surface is streamlined with the medium. The sealing performance is better and the service life is longer.


3. Dual seal design (bellows + packing) if bellows fail, stem packing will also avoid leakage, and in line with international sealing standards.


4. The valve cover is equipped with a greasing joint, which can directly lubricate the stem, nut and shaft sleeve, unlike the traditional lubrication only for threads.


Technical parameters of bellows gate valves

Nominal pressure(MPa)
Shell test pressure(MPa)
Seal test pressure(MPa)
(℃)
Use medium
1.6
2.4
1.76
≤350℃
Water, steam, oil, etc.
2.5
3.75
2.75
4.0
6.0
4.4
6.4
9.6
7.04


Bellows gate valve main parts material


No
Name
Texture of material
1
valve body
WCB WC1、WC6、WC9、C5 CF8、CF8M、CF3、CF3M
2
Valve plate
25、1Cr13、2Cr13 1Cr18Ni9Ti、0Cr18Ni12Mo2Ti 20Cr1Mo1V、25Cr2MoV
3
Stem
25、1Cr13、2Cr13 1Cr18Ni9Ti、0Cr18Ni12Mo2Ti 20Cr1Mo1V、25Cr2MoV
4
Bellows assembly
1Cr18Ni9Ti、304、316、304L、316L
5
Bracket
WCB、WC1、WC6、WC9、C5 CF8、CF8M、CF3、CF3M、
6
Shim
柔性石墨+不锈钢Flexible graphite+stainless steel、PTFE
7
Valve cover
WCB WC1、WC6、WC9、C5 CF8、CF8M、CF3、CF3M
8
Hexagon nut
0Cr18Ni9Ti、0Cr18Ni12Mo2Ti 35CrMoV、25Cr2MoV
9
Double head bolt
0Cr18Ni9Ti、0Cr18Ni12Mo2Ti 35CrMoV、25Cr2MoV
10
filler
柔性石墨
11
Packing gland
WCB WC1、WC6、WC9、C5 CF8、CF8M、CF3、CF3M
12
Stem nut
铜合金
13
handwheel
WCB QT400-18


Main dimensions of bellows gate valves


Model
WZ41-16
Pressure grade
PN16
caliber
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
L
108
117
127
140
165
178
190
203
229
254
267
292
330
356
381
H
200
210
250
260
290
370
398
440
490
530
580
670
760
850
950
W
120
140
140
180
200
220
260
280
300
340
400
450
450
500
500
(kg)
8
9
10
15
22
30
43
57
73
105
150
190
270
380
480



Model
WZ41-25
Pressure grade
PN25
caliber
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
L
140
152
165
178
190
216
241
283
305
381
403
419
457
502
762
H
200
210
250
260
290
370
398
440
490
530
580
670
760
850
980
W
120
140
140
180
200
220
260
280
300
340
400
450
450
500
500
(kg)
9
10
12
17
23
34
50
65
82
115
165
210
300
420
540



Model
WZ41-40
Pressure grade
PN40
caliber
15
20
25
32
40
50
65
80
100
125
150
200
250
300
350
L
165
190
216
229
241
292
330
356
432
508
559
660
787
838
889
H
200
210
250
260
290
370
398
440
490
530
580
670
760
850
980
W
120
140
140
180
200
220
260
280
300
340
400
450
450
500
500
(kg)
9
10
12
18
25
38
53
70
88
125
175
225
310
440
560


The best quality, first-class service Qigao creates more value for you!

"Qigao Valve" expects to continuously improve service quality and strive for excellence. "Sincere service" is the eternal theme of "Qigao". "Qigao" strictly followsIS09001-2000 Quality system certification requirements, strict quality control, responsibility to people, to ensure the healthy operation of production, sales and service. Strengthen communication with users and provide quality products to our customers with perfection and perfect service. Hereby our factory makes the following commitments:

Product Standards:

Products in strict accordance with ChinaGB、HG Standard and USAPISuch as standard design, manufacturing, acceptance. The hardness of the sealing surface meets the requirements of the state and the width exceeds the national standard.

pre-sale service:

Product introduction, technical exchange, non-standard product design, troubleshooting。

Sale service:

A trustworthy contract guarantees timely delivery and keeps in touch with customers. For special or duplicate products, our factory arranges technicians to use and troubleshoot the products for users.

After sales service:

1、"Qigao" brand product quality period is from the factory12In the month, the implementation of the "three guarantees" service (return, replacement, warranty).

2、During the use of our products, our factory regularly organizes technical and quality inspection personnel to visit and consult users for feedback on product quality, usage status and improvement opinions, so as to further improve product quality.

3、Respond quickly to the quality of user complaints, after-sales service personnel rushed to the scene in 24-36 hours (48 hours outside the province).

4、For after-sales service, users are required to fill out the quality feedback information form after the service and make an appraisal opinion in order to improve the service quality of Qigao.

1、If the customer has special requirements for the product, the following instructions must be provided in the order contract.:

a、Structure length;

b、Connection Type;

c、Nominal diameter, full diameter, reduced diameter, pipe size;

d、Operating medium and temperature, pressure range;

e、Tests, inspection standards and other requirements

2、The factory can configure various types of driving devices according to customer's specific requirements.。

3、If the type and model of the valve are determined by the customer, the customer shall correctly state the meaning and requirements of the model and sign the contract under the condition that the supplier and the buyer understand each other.

4、For futures and order customers, please call us in advance to tell the required valve model, specification, quantity, delivery time and location, and timely transfer to the factory account according to the total 30% deposit or full payment. The rest of the payment is pending. Import before shipment to arrange delivery in time.

 

Order Process:

1、Customer purchase list fax to021-33872143,Or call us 021-33872141

2、Receive customer purchase list, provide valve model selection and quotation (price list)。

3、Specific agreement: delivery date, special requirements, etc.。

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1、If the customer has special requirements for the product, the following instructions must be provided in the order contract.:

a、Structure length;

b、Connection Type;

c、Nominal diameter, full diameter, reduced diameter, pipe size;

d、Operating medium and temperature, pressure range;

e、Tests, inspection standards and other requirements

2、The factory can configure various types of driving devices according to customer's specific requirements.。

3、If the type and model of the valve are determined by the customer, the customer shall correctly state the meaning and requirements of the model and sign the contract under the condition that the supplier and the buyer understand each other.

4、For futures and order customers, please call us first to tell the required valve model, specifications, quantity, delivery time and location, and press the total30%The deposit or full payment will be remitted to our factory account in time., The rest of the payment will be remitted before shipment to arrange delivery in time.。

Sale service:

Trustworthy contract, guarantee timely delivery, keep in touch with customers at any time。

For special or duplicate products, our factory arranges technicians to use and troubleshoot the products for users.

After sales service:

1、"Qigao" product quality period is from the factory12Month, practiceThree packsService (return, replacement, warranty)。

2、During the use of our products, our factory regularly organizes technical and quality inspection personnel to visit and consult users for feedback on product quality, usage status and improvement opinions.,
In order to further improve product quality。

3、Respond quickly to the quality of user complaints, after-sales service personnel24-36Hours (outside the province48Hour) rushed to the scene。

4、For after-sales service, the user is required to fill out the quality feedback information form after the service and make an appraisal opinion in order to improve the service quality of “Qigao”.。

statement

  1. All text, data and pictures in this article are for reference only.bellows gate valvePlease contact us at 4000-700-665 for details of performance, size and price.
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