Water supply pneumatic valve selection and set the position

（ A) Feed water pipe on the use of pneumatic valve, general principle according to the following options:
and pipe diameter is not more than mm, appropriate is used by the pneumatic valve, pipe diameter greater than the mm adopts pneumatic valve, pneumatic butterfly valve gate
, be used to adjust the flow rate and pressure regulating pneumatic valve, globe pneumatic valve
and flow resistance small parts ( Such as water pump suction pipe) , appropriate USES pneumatic valve gate is
to be two-way flow, flow should be adopted on the section of brake pneumatic valve, butterfly valve, pneumatic valve shall not be used by the
, small installation space of appropriate USES control of pneumatic valves, pneumatic ball valve
, on the section of frequently opening and closing, appropriate is used as pneumatic valve
, diameter larger water pump outlet pipe on the appropriate USES multi-functional pneumatic valve
( 2) Water supply pipe pneumatic valves shall be set up of the following parts:
, residential area water supply pipeline from the introduction of municipal water supply pipeline section
and residential area outside annular pipe network node, should be set according to the requirements of separation. Circular section is too long, the appropriate
Settings section of pneumatic valve, pick out from the residential area water main branch pipe meet the household starts or promises -
, enter a pipe, water meter and each branch pipe ( At the bottom of the riser, vertical loop network, the bottom part of the riser)
, loop system of main, well versed in the dendritic pipeline network connecting pipe
, indoor water supply pipe to the residents, public toilet, etc. Meet the promises - pipes, water pipe in a water distribution point on and more than a set when
, water pump outlet pipe, since the irrigation pump suction pump
, inlet and outlet pipe of water tank, drain pipe
and equipment ( Such as a heater, cooling towers, etc. ) The water filling water pipe
, sanitary ware, Such as large, urinal, wash basin, shower, etc. )
pipes, some accessories, such as automatic exhaust pneumatic valve, pressure relief valves, water hammer eliminator, pressure gauge, such as sprinkler bolt before, before and after the decompression of pneumatic valve and the backflow, etc.
appropriate setting drainage, water supply pipe network in the lowest place pneumatic valve
( 3) Check pneumatic valve shall be installed according to the site, before following the closure of the hydraulic, pneumatic valve sealing performance and closing caused by factors such as water hammer size to choose
, pneumatic valve, hydraulic hours before appropriate chooses swing and shuttle check pneumatic valve, ball type
, after close airtight performance requirements closely, appropriate chooses a close check pneumatic valve spring
and closed water hammer undercut, appropriate chooses sound check pneumatic quick closing valve or a damping device slowly-closing
check pneumatic valve, the check of the pneumatic valve pneumatic valve break or pneumatic valve core, should be under the action of gravity and spring force to shut down
( 4) Water supply pipeline check pneumatic valve shall be set up in the following section:
introduction of pipe; Closed on the inlet pipe of the water heater or water equipment; The water pump outlet pipe; Share a pipeline in and out of the water tank, water tower, highland pool water section.
note: equipped with pipeline section of backflow, does not need to check in pneumatic valve.
　　( Five of the following parts of the water supply pipe should be set exhaust:
and intermittent use of the water supply pipe network, the and the highest point at the ends of pipe shall be set up automatic exhaust
pneumatic valve, water supply, has obvious ups and downs accumulation of air pipe section of pipeline network has been set in the peak point of the this automatic exhaust pneumatic valve or manual pneumatic valve exhaust
, pressure water supply equipment, when automatic fill gas pressure tank is used, its the highest point of the water distribution pipe network should set automatic exhaust pneumatic valve