It should be noted that the outlet check valve cannot be installed backwards or stuck.
应当注意，出口止回阀不能装反或出现卡死现象。
This positions the relief valve below the first check valve, enabling the zone to drain through the relief valve outlet.
在这种位置，安全阀位于第一止回阀下面，使得这个区能够通过安全阀出口排放。
And a by-pass pipe with check valve is set between the inlet and outlet of circulating pump.
在循环泵进出口之间设置带止回阀的旁通管。
Add the resistance in the outlet to lower the capacity. Check the resistance in the suction pipe of pump. Check the bottom valve and lower the high of suction position.
增加出水管阻力以减低流量，检查泵吸水管内阻力，检查底阀减小吸水高度。
A leeward side of the box is provided with at least one air outlet having a vent check valve.
所述箱体的背风面至少具有一个带有出气单向阀的出气口。
A leeward side of the box is provided with at least one air outlet having a vent check valve.
所述箱体的背风面至少具有一个带有出气单向阀的出气口。
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