Bundor 4" /DN100 flanged dn20 brass seal ggg50 class150 large diameter 300mm gate valve with prices

Advantage:

1.Cast iron  body adopts HT200, executes GB/T12229-2005 tensile strength 180~210Mpa.

2.Bonnet material adopts HT200,same as body material, its wall thickness in accordance with the requirements of GB, EN standards, in accordance with the requirements of API standards, with a sealed seat;  if the bonnet was stainless steel material, the upper seal seat wil be one  an indivisible whole.
3.The design of T stem processing with spherical head , make contact with the gate size is more reliable; according to the API standard, its surface roughness grinding must reach Ra0.8 μm,  to reduce the operating friction resistance and to prevent leakage of filler.
4.Stem nut according to API standard material A493-D2, QT450-10, if stainless steel, its material is bronze.
5.The standard for body ,bonnet and bolts shall be full tooth bolts, in accordance with the specifications of API, and shall be fitted with heavy nuts, whose bolts / nuts shall be manufactured in strict accordance with the specifications of ASME, B1.1, ASME, B18.2.2.
6.The valve seat is made of QT450 material, and the aluminum bronze and the wedge face have different hardness. Stainless steel valve seat as a whole, and can be welded with special carbide according to requirements.

Q:When the products will be shipped ?
A:Within 7-15 days after receing the prepayment.

Q:Do you have OEM service ?
A:Yes . A variety of products size , quality and quantity can be cutomized according to your needs. 

Q:Could you offer a free sample ? 
A:Yes , samples can be proveded for free. 

Q:How can I pay for the products ? 
A: We accept a variety of payment methods. Such as T/T , L/C,D/P ,Western Union , Paypal ,Trade Assurance. 

Q: How do you deal with that if there are some quality problems in products?
A: We will be responsible for all the quality problems.

Q:Are you a facrory or trade company ?
A: We are a factory with 24 years experience in valve research and production .