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. |
size: | 2”-72” |
pressure: | ≤7500psi |
Material selection: | 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 |
weight: | ≤3Ton |
process: | Resin sand casting, etc. |
Wenzhou Longzhu Industrial Co.，Ltd
Sales manager： Mrs.peng E-mail: sylvia@china-longzhu.com
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.
Company Profile:
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.
Detection technology
All the time, Longzhu adheres to a quality policy of "Treating People with Sincerity, Seeking for Prosperity with Quality" and a principle of "Reputation First, Quality First", sets up an industry-leading modern quality inspection and test center, and tests outgoing products strictly with direct-reading spectrometer, fluorescent magnetic particle inspection, all-digital ultrasonic fault detectors, screen display hydraulic pressure universal testers, radiographic testing machine, coordinate Measuring Machine, molten steel thermocouple thermometer and other inspection devices. So far, Longzhu has obtained the CE certification of the EU and the ISO9001 Quality Management System certification relying on its reliable product quality.
