The application of pneumatic type knife gate valve in a certain coal washery

in modified in years of dense medium coal preparation, coal washing process is mainly jigging roughing, dense medium cyclone, coal slime flotation, mainly in dense medium process piping, solid liquid two phase mixture of heavy medium suspension medium of pipeline and equipment wear, brake pneumatic valve is mainly used in the pipeline pneumatic type knife gate valve.
we are now using pneumatic type knife gate valve can be divided into manual, electric and electric hydraulic three forms, models are mainly PZ this pneumatic type knife gate valve, PZ electric wafer type knife gate valve pneumatic valve, PZ electric hydraulic pneumatic valve, wafer type knife gate valve manufacturer mainly of pneumatic valve factory in zhejiang province. Pneumatic type knife gate valve by pneumatic valve, pneumatic valve, pneumatic valve stem, the handwheel ( Drive) And seals, ram, pneumatic valve stem and the cover is made of stainless steel, good abrasion resistance, pneumatic valve is carbon steel. Seals are divided into fluorine plastic, alloy steel and rubber seal. Pneumatic type knife gate valve opening and closing is ram, direction and perpendicular to the direction of flow of the gate on the handle or electro-hydraulic actuator, pneumatic valve by pneumatic valve rod drives the ram gate opening and closing.
。 The characteristics of the pneumatic type knife gate valve
pneumatic type knife gate valve adopts the wafer structure, compact structure, small volume, light weight, small footprint, easy to install, pneumatic valve open close brake energy, reduce the labor intensity of the maintenance workers.
pneumatic type knife gate valve gate bottom for the blade shape, the material, fiber and sundry has cut off function, blocking gate, not easily open and close at the same time has good effect.
reasonable sealing surface and the packing design, make the pneumatic valve sealing is reliable.
the damper has multiple points, make the damper has good from to.
the upper knife plate fitted with teflon wiper, can prevent the dust and scratch sexual material such as sand into the stuffing box, improve the working life of the ram.
。 Usage and points for attention
p z type wafer type knife gate valve pneumatic valve in our main used in dense medium and slurry pipeline, mainly to do by using in the line, cannot be used as adjusting flow, gate should be full open or full close, lest sealing or ram by erosion, accelerated wear and greatly reduce the service life.
when installation should pay attention to the pneumatic valve installation direction, gate with chamfer is on one side of the pneumatic valve is turned off with pressure, pneumatic valve body direction arrow for pneumatic valve opens after the flow direction of medium.
pneumatic valve in use should be regularly in the movement parts filling lubricating oil.
after long-term use of pneumatic valve, packing wear, should be timely replacement of packing, packing gland bolts shall be uniformly tight, should not be pressed into a state of skew, lest hinder bruised pneumatic valve rod movement or cause leakage.
pneumatic type knife gate valve used in the coal washery of process piping, use effect is very good, easy installation and maintenance workers, maintenance the labor intensity is low, in use process is mainly the lock body severe wear lead to brake pneumatic valve leakage, closed lax, five or six months will need to replace the brake of a complete set of pneumatic valve. Improved aerodynamic body material or improving the structure of gate body internal flow components improve brake pneumatic valve in wear medium in the pipeline service life, is the hope of users.