Repair clamps

Repair leaking pipes in minimal time

Repair galvanized clamps type “crab”

SizeDNDiameter, mmWidth, mmWeight, kgPackaging, pcs Repair galvanized clamps type “crab”
½″ DN 15 20–24 70 0.17 100
¾″ DN 20 25–29 70 0.18 100
1″ DN 25 32–35 70 0.21 50
1 ¼″ DN 32 40–44 70 0.23 50
1 ½″ DN 40 45–53 70 0.26 50
2″ DN 50 57–67 70 0.29 50
2 ½″ DN 65 74–82 70 0.34 50
3″ DN 80 87–95 70 0.38 50
3 ½″   101–110 150 0.99 10
4″   114–121 150 1.03 10
5″   133–146 150 1.21 10
6″   159–172 150 1.40 10

Possible compiling of repair clamps up to diameter 516 mm

Clamps packed in individual plastic bags with the size of the product.
For the convenience of transportation products are packaged in a common transport packaging according to the table.

Use of repair clamp

Steel galvanized clamps are used for repair leaking pipes of water and heating supply.

Design of repair clamp

Clamp sleeve

Repair clams are made of zinc-galvanized steel. The thickness of the body is 1 mm, the clamp sleeve — 2 mm. The clamps tightened with bolts and nuts M6 or M8. Fastening elements galvanized.

Seal type wafer

The thickness of the seal is 3 mm for clamps ½″—3″ and 5 mm for clamps 3 ½″—6″. Nitrile butadiene rubber (NBR) is used to manufacture seal, working temperature range from −50°С to +110°С, solidification time at +140°С  is 42 minutes. The seal is glued to the body. The surface sealing of the “wafer”-type.

Repair clamps eliminate depressurization of pipelines in case of cracks or leaks, if the size of the injury does not exceed the length of the clamp 20 mm from each edge and ⅔ of the pipe diameter.

Video review of repair clamp

How repair clamp works video

Technical data

Operating pressure recommended limits is
16 bar for clamps ½″—3″ and 10 bar for clamps 3 ½″—6″
Operating temperature
range of rubber
from −50°С to +110°С

The possible compiling of repair clamps type “crab”

Due to the design, to cover additional sizes of pipes is possible by connecting clamps of this type among themselves.

In the case of a two-part connection may overlap to 344 mm outer diameter, and in the case of connection of three clamps — up to 516 mm.

The possible compiling of repair clamps 150 mm length

Outer diameter of pipe, mmPossible option

Compiled repair clamp

Compiled repair clamp

202-220 3 ½″ + 3 ½″
215-231 3 ½″ + 4″
228-242 4″ + 4″
234-256 3 ½″ + 5″
247-267 4″ + 5″
260-282 3 ½″ + 6″
266-292 5″ + 5″
273-293 4″ + 6″
292-318 5″ + 6″
303-330 3 ½″ + 3 ½″ + 3 ½″
316-341 3 ½″ + 3 ½″ + 4″
318-344 6″ + 6″
329-352 4″ + 4″ + 3 ½″
335-366 3 ½″ + 3 ½″ + 5″
342-363 4″ + 4″ + 4″
361-388 4″ + 4″ + 5″
361-392 3 ½″ + 3 ½″ + 6″
367-402 5″ + 5″ + 3 ½″
380-413 5″ + 5″ + 4″
387-414 4″ + 4″ + 6″
399-438 5″ + 5″ + 5″
419-454 6″ + 6″ + 3 ½″
425-464 5″ + 5″ + 6″
432-465 6″ + 6″ + 4″
451-490 6″ + 6″ + 5″
477-516 6″ + 6″ + 6″