Crane 11b38bk and its distant relatives

In this article we have to get acquainted with several domestic cranes. They differ significantly in material and design. We have combined them in one material on a single basis - a close alphanumeric designation.

Terminology

At first we will get acquainted with the basic concepts concerning a constructive execution of gates.

• Screw is called a tap that blocks water by rotating a screw rod with a movable valve at the end. The valve is pressed against the saddle, closing the hole in it.
• Suberic the valve blocks the pipeline by turning the conical core with a through hole. For this type of valves, a fairly large force is required to change the position of the plug.

Note! Larger cranes are often equipped with a lubrication system that reduces friction between the plug and the casing.

• Sharovy The crane differs from the cork in the shape of a bolt (a ball instead of a truncated cone) and the presence of sealing seats made of a material with a low friction coefficient - fluoroplastic or teflon.
• Three way called a faucet, having three outlet for the working environment. Depending on the position of the shutter, they can form various configurations that redirect flows in the right direction.

Allow me to introduce

Gate 11b38bk

Before us is a cork three-way valve, designed to install a pressure gauge. Price - 130 - 200 rubles, depending on the version. Body and cork material - brass.

All types of cranes 11b38bk - tension. This means that the valve is sealed only by clamping the plug to the body with a nut on the passing shank; stuffing box is missing as a class.

On sale you can find several versions of the crane:

1. With and without grip.
2. With threads DU15 and M20x1.5.
3. With a drain hole for pressure relief and a flange for connecting a test pressure gauge.

Gate 11ch38p

Crane 11ch38p - a rather exotic hybrid, ball valve with cast-iron housing.

We present the characteristics of this type of products.

About the crane is curious to know a few things.

• Manufacturers offer them only for coupling, with internal pipe threads on both sides.
• Tightness of the valve in accordance with GOST 9544 - 2005 corresponds to class C. On the practical side, this means that in the closed state, the valve can legally poison slightly. For ball valves in general, this is not typical.
• The rod is made under the handle, but it is not included in the kit.

Gate 11s31p

Crane 11s31p also refers to the ball, but very different from its relative 11ch38p.

Please note: to compensate for the wear of the valve seats, stainless steel disk springs are installed under them.

Gate 11s321bk

Crane 11s321bk - a rather exotic cork valve designed to work in gas pipelines at ambient temperatures up to +70 degrees.

The dimensions of the crane - DU400, DU500 and DU700; weight - from two to five tons. Since, with such dimensions, it is obviously impossible to rotate the crane plug with your own hands, the design is supplemented with a worm gearbox and a lubrication system for the plug. Pipeline connection - welded.

Curious features of the product:

• The crane is mounted strictly vertically. This instruction is related to the need for periodic maintenance of the gearbox.
• Its body is equipped with a bypass, equalizing the pressure on both sides of the tube. Branch is supplied with own crane.
• The body of the crane is made of carbon steel, the cork is made of cast iron.

Gate 11s32p

The 11s32p crane is almost completely identical to the 11s31p already reviewed by us:

• The valve is designed as a ball valve with a stainless steel valve and a fluoroplastic seal.
• Size - from 15 to 300 millimeters.
• Working pressure - 25 or 40 atmospheres.
• The body is all-welded steel.
• MTBF is at least 7000 cycles.

The principal difference is only in the method of joining the pipeline: in this case, flanges are provided for it. They provide, on the one hand, quick disassembly with the possibility of replacing the valve (and without the mandatory complete drainage of the pipe); on the other hand, the need to pre-adapt the pipeline for a crane.

Gate 11s33p

Ball valve 11s33p - almost complete duplicate of the previous product.

It is almost because:

1. Its mounting size is adjusted in such a way as to correspond to the dimensions of the steel latch 30s41nzh. This feature allows you to install it in place of the valve without digesting pipe flanges.
2. The working pressure is slightly less than that of the twin - only 16 kgf / cm2.

Conclusion

Of course, in the framework of this article, we have considered only a small part of the shutoff valves manufactured by the domestic industry. As usual, additional materials can be found by viewing the video in this article. Successes!