Introduction of Hard Touch Bidirectional Flow Rotary Ball Valve
2015/5/4 view:
The most exquisite and cost-effective ball valves in the world and most valves in the pipeline system are mainly used to cut off and regulate the medium. These valves account for a large proportion of the whole system and use a large amount. They require a high durability-cost ratio of the valve. At the same time, they should be able to regulate and cut off the medium when the medium is in the forward flow, and can prevent the medium backflow when the pressure difference is changed or overhauled, i.e. crowding. It has two-way cut-off function. Recently, this part of the valve in the pipeline system, the main application of globe valve, gate valve, butterfly valve and ball valve. Globe valves and gate valves, with good two-way cut-off function, good sealing performance and service life, are one of the ancestors of valves, but the globe valves are congenitally limited by the structure of the shut-off gate, the shape of large operating moment, can not produce large caliber, currently the largest market is only DN400; gate valves have no regulating function to regulate the flow, there is a major risk of gate falling off, and large. Caliber gate valves are also difficult to manufacture and transport because of their huge shape and height. Compared with gate valves, butterfly valves have the characteristics of short opening and closing time, small operating moment, small installation space and light weight, etc. Some divisions of labor use butterfly valves instead of gate valves. However, the sealing performance of butterfly valves has not fully met the market requirements, except that the middle-line rubber-lined butterfly valves can be sealed in a certain range of pressure, other structures are basically unidirectional flow. The midline structure is limited by rubber and can not be popularized. After improvement, there are two-way butterfly valves with stainless steel elastic sheet structure on the market, but the price is high. Mainly used in oil, natural gas, gas and other media more important pipelines, in the general pipeline network, especially water system application is very rare.
Material of Hard Touch Bidirectional Flow Rotary Ball Valve
A) Valve body: carbon steel (except as indicated in the list of cargo requirements);
B) Valve plate: stainless steel;
C) Stem: stainless steel;
D) Sealing surface: surfacing cobalt-based cemented carbide.
Technical Requirements for Hard-Touch Bidirectional Flow Rotary Ball Valve
(a) Sediment resistance;
B) The valve opens and closes flexibly and is not affected by the medium pressure.
C) There is no open-close friction between the seat and the valve plate, and the tighter the closure is, the tighter the closure is.
D) Valve plate sealing ring has sealing compensation function;
Technical parameters of hard-impact bidirectional flow rotary ball valve
The contact medium of the valve is reservoir raw water, turbine oil or insulating oil. It is an eccentric worm wheel drive flange type rotary ball valve. The sealing type is metal-to-metal seal, and the driving type is worm wheel drive. Rotary ball valve can flow bidirectionally, and the bidirectional sealing performance can meet the nominal pressure requirements.
Material of Hard Touch Bidirectional Flow Rotary Ball Valve
A) Valve body: carbon steel (except as indicated in the list of cargo requirements);
B) Valve plate: stainless steel;
C) Stem: stainless steel;
D) Sealing surface: surfacing cobalt-based cemented carbide.
Technical Requirements for Hard-Touch Bidirectional Flow Rotary Ball Valve
(a) Sediment resistance;
B) The valve opens and closes flexibly and is not affected by the medium pressure.
C) There is no open-close friction between the seat and the valve plate, and the tighter the closure is, the tighter the closure is.
D) Valve plate sealing ring has sealing compensation function;
Technical parameters of hard-impact bidirectional flow rotary ball valve
The contact medium of the valve is reservoir raw water, turbine oil or insulating oil. It is an eccentric worm wheel drive flange type rotary ball valve. The sealing type is metal-to-metal seal, and the driving type is worm wheel drive. Rotary ball valve can flow bidirectionally, and the bidirectional sealing performance can meet the nominal pressure requirements.
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