With more than 30 years of casting history, Wenzhou Longzhu Industrial Co., Ltd. has a large number of experienced casting engineers and technicians. We can produce castings of various sizes, shapes and materials according to the drawings provided by customers, especially in the field of valve castings. Cooperate with Fortune 500 companies for many years.
GS-C251.0619,WCB.WCC,LCB,LCC,LC3,4C,4D,WC6,C5,C12, C12A,CA15，CF3,CF8(-196’C),CF3M,CF8M,CF8C,CD4MCu,CK3MC uN,ZG200-400,ZG230-450,ZG270-500,2G40Cr1,ZG20CrM0.2G15C r1Mo1V,ZG35Cr1MO.ZG16CrMOG(1Cr5Mo),ZG1Cr13,ZGOCr18Ni9 Ti.5A.KmTB Cr26.4A
Resin sand casting, etc.
Sales manager： Mrs.peng E-mail: firstname.lastname@example.org
Tel： 0086-0577-86621768 Fax： 0086-0577-86621935
Address ： No.19 Longyong Road.Xiongxin Village. Longwan,Wenzhou,Zhejiang,China
The butterfly valve has a small structural length and overall height, a fast opening and closing speed, and good fluid control characteristics. The structural principle of the butterfly valve is most suitable for making large diameter valves. When a butterfly valve is required for control flow, the most important thing is to correctly select the size and type of the butterfly valve so that it can work properly and efficiently.
Generally, in throttling, adjustment control and mud medium, it is required to have a short structure length, a fast opening and closing speed, and a low pressure cutoff (small pressure difference), and a butterfly valve is recommended. Butterfly valves are available for two-position adjustment, reduced diameter channels, low noise, cavitation and vaporization, a small amount of leakage into the atmosphere, and abrasive media. Throttling adjustment under special working conditions, or requiring strict sealing, severe wear, low temperature (deep cooling) and other working conditions.
1. The opening and closing torque is small. Since the butterfly plates on both sides of the rotating shaft are basically equal by the medium, the torque is generated in the opposite direction, so the opening and closing is relatively labor-saving.
2. The sealing surface material is generally made of rubber and plastic, so the low-pressure sealing performance is good.
3. Easy to install.
4. Flexible and labor-saving operation, manual, electric, pneumatic and hydraulic modes are available.
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2. Reliable service and good communication
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1. Arrange shipment, and Inform customer in advance 7 days before finishing the order;
2. Before shipment, send the detailed product pictures, dimension inspection report, material report to customer;
3. Welcome customer inspection and the third party inspection;
4. Expressing original document;
5. Contact us for more information.