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: email@example.com
Tel： 0086-0577-86621768 Fax： 0086-0577-86621935
Address ： No.19 Longyong Road.Xiongxin Village. Longwan,Wenzhou,Zhejiang,China
The butterfly valve is suitable for flow regulation. Since the pressure loss of the butterfly valve in the pipe is relatively large, about three times that of the gate valve, when selecting the butterfly valve, the influence of the pressure loss of the pipeline system should be fully considered, and the strength of the disk medium subjected to the pressure of the pipeline when closing should also be considered. In addition, the limits of the operating temperature of the elastomeric seat material at elevated temperatures must also be considered.
Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. Mainly cut and throttle on the pipeline. The butterfly valve opening and closing member is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting.
Ordinary casting coatings only play a role of blocking and isolating between castings and moulds to achieve the purpose of anti-sticking sand. However, due to poor adhesion, low strength, poor fire resistance and large gas emission, common casting coatings are liable to cause defects such as sticking sand, sand holes, pore and carbon slag in castings.
1, It is convenient, quick, labor-saving, and has low fluid resistance. It can be operated frequently.
2, Simple structure, small size, short structure length, small size, light weight, suitable for large diameter valves.
3, Can transport mud, the least amount of liquid accumulated in the pipe mouth.
4, Under low pressure, can achieve a good seal.
5, The adjustment performance is good.
Over the years, Longzhu has always taken continuous improvement and final customer satisfaction as its tenet, firmly established a rapid and considerate service concept, always adhered to being market-and customer-oriented, provided sound after-sales service according to customers' requirements and enhanced customer value maximally. Currently, Longzhu has a broad overseas market, while 80% of its products are exported to the USA, Germany, Canada, Britain, Japan, Switzerland, India and other countries and regions and are highly praised by customers for quality.
1. Manufacturing exactly according to customer's drawings,strict quality control system to ensure 100% customer satisfaction.
2. Timely delivery time can be guaranteed.
3. Quotations can be offered within the shortest possible time.
4. Responding to the enquiry within 2 hours.
5. 24-hour online service.
6. The best price with high quality and service.
7. The most suitable packing method to different products.