Memory seal ball valves utifizes unique memory seal seats with high seal performance, meet all requirements for oil and gas pipeline service to handle a vast variety of fluids, slurries, semi-solids and almost any corrosive medium.
Design features
Compensate automatically for wear and flutuations of pressure and temperature.
Stem bearing reduce side thrust
Long cycle life
Low torques
Live-loaded thrust washer prevents galling
Fire safety and antistatic devices
Full guided stem-no leakage
All ball valve can be equipped with electric, pneumatic, hydraulic or gear actuators.
Advantages
SEATS"IN-TENSION"
Greater strength
Less fatigue
Positive bi-directional shutoff
Commpensate for temperature fluctuations
Uniform torque
High cycle life
Eliminate cold flow effects
2. LARGER SEALING AREA
Superior sealing
3. SELF-RELIEVING SEATS
For self-relieving applications, we supply special self-relieving seats or drill a hole in the ball.
Design norm
Basic design ASME B 16.34 BS5351
Face to face ASME B 16.10 GB12221
Flange dimension ASME B 16.5 GB HG SH
Socket-weld ASME B 16.11
Screwed-weld ASME B 1.20. 1
Valve testing API598
Zhejiang Xulong Machinery Industry Co., Ltd. specilizes in manufacturing all kinds of high pressure and medium pressure valves. His special feature is to develop high technology, high quality, and very difficult special valves. Products of pneumatic conveying system for bulk materials(consists of rotary feeder, diverter valve and slide gate valve) memory seal ball valves, non slam tilting disc check valve, sampling valve, discharge valve, and security eye-washing sprayer are high technology and honorary products of Xulong. Xulong processes a lot of valve experts who are more than ten years experiance in valve design and manufacture, and build Xulong valve research institute, The design is surportes by Auto-CAD three direction auxiliaries, and ProE; Xulong has passed ISO9001, API 6D quality assurance and the AZ license.
Xulong is the appointed supplier for China Petrochemical Company, China Olean Natural Gas Company, previous chemical Department of China, domestic large size petrochemical enterprises. It is one-tech enterprises in Zhejiang who owns self-operated Import &Export License. Xulong's products have widely been used in oil industry, chemical industry, natural gas industry etc.
