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According to the using requirement 2011-07-21
seal face of seat , the backflow of medium make disc back to seat and the fluid can be cut down .so it like globe valve except moving type of disc .
According to the using requirement , disc can be
the high-pressure small-bore ball valve 2011-07-14
Silent
check valve: valve slide along the vertical centerline of the valve
body, check valve with internal thread can only be installed in
horizontal pipelines, the high-pressure small-bore ball val
as more and more use of components and attention 2011-07-12
Polyethylene is a thermoplastic engineering plastic material, has certain strength, stiffness, toughness, impact resistance, corrosion resistance and wears resistance. By controlling the polymerizatio
the non rising stem gate valve 2011-07-11
The
rising stem and the non rising stem gate valve are the two different
types of valves commonly used in most of the places today. The rising
stem valve is identified by a threaded shaft which is r
make allowances to retro- fit TRVs 2011-07-04
I can will make allowances to retro- fit TRVs in each room if the room on the upper floor loops only If heating is uneven. But I intend to have the heating on in all rooms constantly from November to
hot blast dongshen gas 2011-06-30
Electric hard sealing butterfly gold, chemical industry, building
materials, power stations, glass industries of the ventilation,
environmental protection engineering cold or hot blast dongshen gas
