, for example, suppose a tank cover, water enters from the bottom of the cylinder, the outflow from the crock mouth, cylinder head is equivalent to closing a valve. If the lift cylinder head with the hand, is equivalent to the working principle of globe valve. If use hand to remove the cylinder head side, equivalent to the working principle of a gate.

main criteria:

1, the design standards: GB/T 12235

2, connection standard:

1) BW: butt welding end according to GB/T 12224

2) RF: flange end regulation according to JB79; GB / T 9113; HG20592

3, Industrial Valves inspection and test:

GB/T 13927. JB/T 9092

using the following structure:

stem scaffolding

bolted bonnet. Internal pressure self-tightening type bonnet

on integral seal seat

details:

stop valve opening and closing is a cylindrical piece of disc, sealing surfaces appear flat or cone, disc make linear movement along the centerline of the fluid. Stem form of exercise, lifting lever ( rod and hand wheel lifting) And lift rotating lever ( Hand wheel rotating lifting with the valve stem and nut in the body) 。 Globe Industrial Valves is only applicable to all seated, tu order when allowed to adjust and throttling.

the cut-off valve opens, the opening of the disc height, is 25% ~ 30% of nominal diameter, flow has reached maximum, said valve to full open position. So stop valve fully open position, should be determined by disc's schedule.

Maintaining y gate valve is not as easy as it may seem. You have to do plenty of important tasks. So cruel is the truth unless you've got a to help you.
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