Fittings

Rotary plugs

Rotary ("eyeglass") plugs according to ATK 26-18-5-93 — for operational disconnection of a pipeline section by turning, without dismantling the flanges. DN 50-500, Pn up to 25.

DN 50–500Roo up to 25ATK 26-18-5-93flangedSteel 20·09Г2С·stainless steel
Rotary plugs
Specifications

Technical parameters

ItemThe plug is rotatable ("glasses")
DesignRing + blind disc, connected by a jumper
PurposeQuick turn-off
Nominal bore DN50-500 mm
Nominal pressure PN6 / 10 / 16 / 25 the bar
InstallationBetween the flanges (flanged)
MaterialСт20, 09Г2С, 12Х18Н10Т
StandardATK 26-18-5-93
Temperature−40…+450 °C
MediumWater, steam, petroleum products, gas
Dimension diagram

Drawing to GOST

D Ring (open)disk (muted) The plug is rotatable ("glasses"): ring + disc, rotates the position

The letters on the diagram correspond to the columns of the dimension table below.

How it works

Principle

Two positions

"Open" means a ring in the flow (passage is open); "Muffled" means a disk (flow is blocked).

Switching

Loosen the bolts, turn the "glasses" around the bridge, tighten — without removing the flanges.

Installation

It is mounted between flanges with gaskets as an inter-flange element.

Dimensions

Dimensions

The diameters of the ring and disc, the thickness and parameters of the bridge are according to ATK 26-18-5-93, depending on the DN, Pn and the connecting dimensions of the counter flanges. We will match it to your flange assembly.

Applications

Where they are used

  • Operational shutdown of repair/revision sites
  • Technological nodes where frequent switching is needed
  • Oil depots, thermal power plants, chemical plants
Order

What to state when ordering

  • DN and PN
  • Flange connection dimensions (D, K)
  • The grade of steel
Questions

Frequently asked questions

What is the "glasses" rotary plug?

These are two elements — a ring and a blind disc connected by a jumper. By turning between the flanges, either a ring is installed (the passage is open) or a disk (the section is plugged).

How is it convenient compared to a blind flange?

Allows you to change the "open/closed" position without completely disassembling — just loosen the bolts and turn.

How are the sizes selected?

According to ATK 26-18-5-93 for Dn, Pn and the connecting dimensions of the flanges.

Where is it installed?

Between the flanges as an inter-flange element with gaskets.

What kind of steels?

Ст20, 09Г2С, 12Х18Н10Т.

We will select and supply for your project

Send the parameters (DN, PN, material, GOST) or a specification — we will prepare an offer with lead times.

Request a quote