PE ball valve construction method – construction methods – filtration and separa
Construction method 1, pre-construction precautions Construction of buried gas in accordance with the provisions of the depth, if buried deeper than construction requirements, you must use the protection tube.
After the first stone excavation, gravel and other debris cleared, and then paved with sand about 10cm thick and the pressure well.
valve and piping connecting junction to keep the level of vertical construction after
and other buried objects should be kept away from laying interval
Local heating above 60 buried surface features such as: THP and other measures used to protect more than 30cm distance to maintain
On water pipes, electrical facilities, materials, communications cable: 30cm or more.
Under water: 20cm or more. 2, manual ball valve 1. Butt weld use 1) to confirm the installation location of ball
Ground water or moisture, changing the install location or the complete removal of water or moisture, the guarantee that the site is not sinking, the foundation must be strong pressure, then adjust to the ground then pipe into the horizontal position
2) tube one end of the first fixed to the welding machine and opened the valve of the package, one end fixed on the ball, if the butt welding machine of fixed length is not sufficient, can not be fixed ball machine on the use of two fixed-fixed , ball at the other end and fixed machine transferred to the same height
Fixed surface processing heating install pressure welding joints heating cooling maintenance welder separation
3) fixing the other end of the tube after the welding method of welding by
Note: to work on the side of the ball when the identity of the arrow must be consistent with the flow of gas
welding operations in order to prevent the ball into the differences in substance use bags, the inside of the valve block
tube and ball valve to the level of vertical welding
4) welding machine takes about 30 minutes after separation of the cooling
5) to "T"-type valve handle removed from the box, assemble finished, then the handle fully inserted into the knob in
Note: Use the "T" type handle to test the valve of the switch state
6) to confirm whether the switching valve
PE ball valve ADAPTER straight pipe length and direction must be marked (-) is the open state at this time
Standard vertical line ( ) is closed at this time
Close (CLOSE): In the open state, the clockwise direction of rotation ADAPTER 90 °
Open (open): In the closed state, the direction of the counterclockwise rotation by ADAPTER 90 °
GEAR BOX's TOP ADAPTER 180 ° left and right, rotating the arrow 90 ° switching
Completely off (FULL CLOSE), fully open (FULL open) state can not drive to open or close
7) using the elution valve leak test
8) valve knob laying around the use of sand
3, using the fused sleeve 1) to confirm the installation location of ball
Ground water or moisture is installed when you change the location or the place full of water or moisture, in order to ensure the site does not sink. Foundation must be strong pressure at this time then pipe into the ground level of adjustment to the position
2) tube Confirm whether pipe cut off at right angles, right angles should be re-cut the unpaired
3) scraping the surface of ball valves and tubes
Valve connection tube surface and tube surface, insert the connecting pipe length of about 20% of the parts marking, marking positions must be full blown, scraping the thickness of 0.2mm, tube surface Guawan, put the connection sleeve packaging removed, the tube fully inserted into the connection tube.
(Removal of the connector, insert the key tube STOPPER)
Note: Blow pipe connection sleeve surface is the most important works, the tube surface must be scraped
4) the ball placed in the burial location, the tube inserted to the connection sleeve tag
5) the other end of the tube is completed by fusion welding methods
L Note: To work the identity of the arrow when the valve switches the flow of gas to be consistent with
Soldering process to prevent the inflow of foreign body within the valve, the use of packaging bags to block the ball inside
Tube and ball valve welded to horizontal and vertical state
6) welding machine takes about 30 minutes after separation of the cooling
7) to "T"-type valve handle removed from the box, after installing the ball with his hand fully inserted into the knob in
L Note: Use the "T" type handle to test the valve of the switch state
8) to confirm valve switch Ball valve ADAPTER line length and direction of PE pipe must be labeled (-) when turned on, the vertical line marked ( ) is turned off when
Close (CLOSE): In the open state of the ADAPTER rotated 90 degrees clockwise
Open (OPEN): In the closed state, the counter-clockwise rotation by 90 degrees ADAPTER
Gear box rotary switch 180 degrees, 90 degrees switching arrow
Completely off (FULL CLOSE). Fully open (FULLOPEN) state can not drive to open and closed
9) using the elution test valve so gas-tight
10) ball valve knob with the sand laying around
4, valve leak test method A) Close valve B) install the elution valve box with the gas-tight test accessories
C) Open the valve Bleeding D) use of air pressure occurs (E prime gas, air pump, etc.) to connect to a gas-tight test tube tooling on the pressure after the injection of the ball inside, turn off the relief valve (test pressure of 1 kg)
E) the pressure device separated from the elution valve connected to a pressure testing machine
F) Open the valve Bleeding Use the connection airtight leak check machine inspection, with or without leakage when the case closed elution ball, do not leak when the valve opens Bleeding
G) gas-tight connection to the pressure over a certain time, to confirm whether the reduced pressure
Completely reduced pressure again after checking whether the leak sealing machine joints.
5, gas leakage inspection machine to use
Valve must be connected in a closed state
Gas connected to the state absolutely can not open the valve, both sides have ventilation gas leak detection equipment can not be detected, tentatively has been the site of gas through the left side of the ball, not pass gas for the right side of the site .
1) Open the ball valve on the side of the Bleeding
2) Open the gas leak tester checks whether the concentration of gas is zero state
3) insert in the elution gas valve leak test instrument
4) check whether the gas concentration in the experimental range
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