Underground Long Stem Fully Welded Ball Valve

Product Detail

Product Description:


This series of products are reliable sealing performance, maintenance-free for 20 years, switch torque light,can be installed in heat transfer stations, district heating pipe network, branch pipes, heat exchanger unit, heat transfer equipment or ancillary equipment connected to other.use for cut off . The main use of the urban heat, city gas, city water supply and drainage lines. 

Standard type:











Five Advantages:

1. integral seamless steel tube pressed full-auto welded without leaking outward.

2. PTFE+25% carbon fiber and disc spring feely compensating structure zero leakage.

3. can be directly buried without need of a high ground well,saving the engineering cost.

4. both valve and pipeling are made of the same material, without the condition of uneven sterss.

5. in multiple connection combination, for use with special working conditions.

Full bore type:














We pay much attention in Test process:

(1) Shell Hydrostatic Test

ANSI B 16.34 Section   7.1
Valve Size NPS	Test pressure	Test Time. Sce
Below DN50	1:5 times the 100°F	15 Sce
DN65~DN200	Rating of  ANSI  Class	60 Sce
Up DN250	Max. Operating Pressure	180 Sce
	Test pressure should   be above 1.5 times  than the valve's Max work pressure (100F)

(2) Seal Hydrostatic Test

The pressure should be more 1.1 times than working pressure by seal hydrastatic test



ANSI B 16.34   Section 7.2
Valve Size NPS	Test pressure	Test Time. Sce
below DN50	1:1 times the 100°F	15 Sce
DN65~DN200	Rating of  ANSI Class	30 Sce
above DN250	Max. Operating Pressure	60 Sce
	Test pressure should be more 1.5 times  than the valve's Max work pressure (100F)	180Sce




(3) Seal Air Test

Seal air leakage test is based on 80PSIG(6kgf/cm2) inert-gas or the air reach the test pressure, then close the valve. after that check the valve whether it is leakage or not.

 


FAQ 

1.What is the MOQ?
According to company regulations 10 sets, 5 sets is also acceptable for intentional customer.

2.What about your payment terms?
30% payment in advance, 70% balance pay T/T before loading.

3.What is your delivery date?
10-30 days after received the advance payment.

4.Which models sell best in your factory?
Q61C-25; Q361FC-16; Q661FC-25; Q961C-25(DN15-DN1400)

5.What kind of certification you have?
CE; ISO9001; EAC; API; TS...


6.How many people in your factory? How many designer and how many QC people?
More than 200 employees, 8 engineers, 55 QC people, 20 years experience.