Production Company Oka

Development and production of specialized pipeline valves

Nuclear

Energy

Shipbuilding

Defense

News and events

Career guidance for schoolchildren and students.

10 November 2026

Class 7B from School No. 1 visited our facility. During the tour, the students observed the complete production cycle of pipeline valves, explored modern equipment, and—under the guidance of mentors—performed several technical operations. This event is part of the company’s ongoing, systematic career guidance initiative for local schools.

A new high‑pressure test bench with high flow characteristics has been put into operation.

30 October 2026

The high‑pressure test bench with high flow rate has been commissioned. The bench is designed for cold tests of safety valves and various IPUs, including IPU KD and IPU PG, at pressures up to 30.0 MPa. The total volume of all tanks is more than 370 litres. The section is equipped with a new compressor unit with a capacity of more than 2.5 m³/min. The test bench section is intended both for developing new types of products and for providing testing services to third‑party organizations. The project was implemented with technical assistance from JSC “NITs NPP”.

LLC PF “Oka” has shipped another batch of high‑pressure valves.

28 October 2026

The Oka enterprise has shipped high‑pressure bellows valves DN 150, equipped with Tula electric actuators, for the needs of the second power unit of the Rooppur NPP under construction. Each product weighs more than a ton, and its unique feature is that these are the only DN 150 bellows valves operating at a pressure of 20.0 MPa, 350 °C, and they have no analogues in the world.

All news

Products

Shut-off bellow valves series КЗО

ТУ 3742-003-57180370-2004

Valve: КЗО 0205, 0207, 0208

Purpose

The valves are intended for installation as shut-off devices on process lines in the nuclear, military, gas, oil, petrochemical, chemical and other industries.

Nominal diameter DN, mm

6…200

Operating pressure, Po MPa

up to 11,0

Operating temperature, To °C

up to 350

Material

12Х18Н10Т, Ст20, 09Г2С, 15ХМ, 10Х17Н13М3Т, 08Х18Н10Т

Sealing

bellows, double sealing bellows

Body

coaxial, with offset branch pipes, straight-through, angular

Control

handle, remote, electric drive

Connection

weld, flange, nipple, bushing

Safety class

4 NP-001, 3, 4 NP-022, NP-016

Product image: Shut-off bellow valves series КЗО

Shut-off bellow valves series КЗА

ТУ 3742-010-57180370-2008

Valve: КЗА 0208, 0210, 0210-200

Purpose

The valves are intended for installation as shut-off devices on process lines in nuclear and thermal power engineering.

Nominal diameter DN, mm

10…150

Operating pressure, Po MPa

up to 4,0

Operating temperature, To °C

up to 250

Material

08Х18Н10Т, Ст20, 15ХМ

Sealing

bellows

Body

coaxial, with offset branch pipes, straight-through

Control

handle, remote, electric drive

Connection

weld

Safety class

2, 3 NP-001, NP-022, NP-016

Product image: Shut-off bellow valves series КЗА

High pressure shut-off bellows valves series КЗА

ТУ 3742-011-57180370-2009

Valve: КЗА 0209

Purpose

The valves are intended for installation as shut-off devices on process lines in nuclear and thermal power engineering.

Nominal diameter DN, mm

10…150

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т, Ст20, 15ХМ

Sealing

bellows with double sealing

Body

coaxial, with offset branch pipes

Control

handle, remote, electric drive

Connection

weld

Safety class

2, 3 NP-001, NP-022, NP-016

Product image: High pressure shut-off bellows valves series КЗА

High-temperature bellows valves series КЗА

ТЗ 3742-013-57180370-2025

Valve: КЗА 0207

Purpose

The valves are intended for use as shut-off devices in the systems of nuclear power plants with WWER reactors, in a sealed nuclear power plant enclosure.

Nominal diameter DN, mm

50…100

Operating pressure, Po MPa

up to 2,5

Operating temperature, To °C

up to 450/600

Material

08Х18Н10Т

Sealing

bellows with double sealing

Body

with offset branch pipes

Control

handle, remote, electric drive

Connection

weld

Safety class

2, 3, 4 NP-001

Product image: High-temperature bellows valves series КЗА

Titanium shut-off valves series КЗТ

ТЗ 3742-016-57180370-2021

Valve: КЗТ 0208, 0210

Purpose

The valves are intended for installation as shut-off devices on Titanium process lines of nuclear power plants of safety classes 2, 3, 4 with sea water.

Nominal diameter DN, mm

10…100

Operating pressure, Po MPa

up to 1,0

Operating temperature, To °C

up to 100

Material

Titanium ВТ1-0

Sealing

gland

Body

coaxial, with offset branch pipes

Control

handle, remote, electric drive

Connection

weld, flange

Safety class

2, 3, 4 NP-001

Product image: Titanium shut-off valves series КЗТ

Control bellows valves series КЗА

ТУ 3742-004-57180370-2016

Valve: КЗА 0204

Purpose

The valves are designed for installation as shut-off devices on impulse pipelines and drainage and blowdown lines for connecting or disconnecting instrumentation and automation equipment.

Nominal diameter DN, mm

6…15

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т

Sealing

bellows

Body

coaxial

Control

handle, remote

Connection

weld

Safety class

2, 3 NP-001, NP-022, NP-016

Product image: Control bellows valves series КЗА

Control shut-off valves series КЗА

ТУ 3742-005-57180370-2019

Valve: КЗА 0204, 0214

Purpose

The valves are intended for installation as shut-off devices on impulse pipelines and drainage and blowdown lines for connecting or disconnecting instrumentation and automation equipment.

Nominal diameter DN, mm

6…15

Operating pressure, Po MPa

up to 25,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т, Ст20, 09Г2С, bronze, 10Х17Н13М3Т, 12Х1МФ, 15Х1М1Ф

Sealing

bellows, gland

Body

coaxial, angular

Control

handle, electric drive

Connection

weld, bushing, nipple

Safety class

4 NP-001, 3, 4 NP-022, NP-016

Product image: Control shut-off valves series КЗА

Control bellows valves series КСР

ТУ 3742-018-57180370-2025

Valve: КСР

Purpose

The valves are intended for operation in nuclear power plant systems, in serviced rooms and in the containment of NPPs and other nuclear facilities, to regulate the flow of the working medium.

Nominal diameter DN, mm

10…150

Operating pressure, Po MPa

up to 2,5

Operating temperature, To °C

up to 250

Material

08Х18Н10Т, Ст20

Sealing

bellows

Body

with offset branch pipes, coaxial

Control

handle, remote, electric drive

Connection

weld

Safety class

2, 3 NP-001, NP-022, NP-016

Product image: Control bellows valves series КСР

High-pressure control bellows valves series КВР

ТУ 3742-028-57180370-2025

Valve: КВР

Purpose

The valves are intended for use in nuclear power plant systems, in manned areas and in the sealed enclosure of nuclear power plants and other nuclear facilities, in order to regulate the flow of the working medium.

Nominal diameter DN, mm

10…100

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т, Ст20

Sealing

bellows

Body

with offset branch pipes, coaxial

Control

handle, remote, electric drive

Connection

weld

Safety class

2, 3 NP-001, NP-022, NP-016

Product image: High-pressure control bellows valves series КВР

Control valves series КДР, КДВ

ТУ 3742-019-57180370-2017

Valve: КДР, КДВ

Purpose

The valves are intended for installation as devices regulating the flow of the working medium on process lines in nuclear and thermal power engineering.

Nominal diameter DN, mm

10…100

Operating pressure, Po MPa

up to 2,5/ 20,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т, Ст20

Sealing

bellows

Body

with offset branch pipes, coaxial

Control

handle, remote, electric drive

Connection

weld, flange

Safety class

4 NP-001, 3, 4 NP-022, NP-016

Product image: Control valves series КДР, КДВ

Check bellows valves series КНЗ

ТУ 3742-021-57180370-2016

Valve: КНЗ

Purpose

The valves are designed for use on process pipelines, including Class 4 safety systems, on floating vessels with nuclear reactors, on nuclear-powered ships and on floating structures as shut-off and check valves.

Nominal diameter DN, mm

10…100

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

up to 350

Material

12Х18Н10Т, Ст20, 09Г2С, bronze, 10Х17Н13М3Т, 12Х1МФ, 15Х1М1Ф

Sealing

bellows

Body

coaxial, with offset branch pipes, straight-through, angular, kingston valve

Control

handle, remote, pneumatic drive

Connection

weld, flange, nipple, bushing

Safety class

4 NP-001, 3, 4 NP-022, NP-016

Product image: Check bellows valves series КНЗ

Gland shut-off and control valves И…, Т…

ТУ 3742-017-57180370-2016

Valve: И, Т

Purpose

The valves are intended for use as shut-off devices on process lines in the nuclear, defense, gas, oil, petrochemical, chemical and other industries.

Nominal diameter DN, mm

10…200

Operating pressure, Po MPa

up to 40,0 (И)/ up to 25,0 (Т)

Operating temperature, To °C

up to 200 (И)/ up to 450 (Т)

Material

12Х18Н10Т, Ст20, 09Г2С, bronze, 10Х17Н13М3Т, 12Х1МФ, 15Х1М1Ф

Sealing

gland

Body

coaxial, with offset branch pipes, straight-through, angular, kingston valve

Control

handle, remote, electric drive

Connection

weld, flange, nipple, bushing

Safety class

4 NP-001, 3, 4 NP-022, NP-016

Product image: Gland shut-off and control valves И…, Т…

High pressure shut-off bellows valves series КЗО

ТУ 3742-012-57180370-2010

Valve: КЗО 0209, 0219, 0229

Purpose

The valves are intended for installation as shut-off devices on process lines in the nuclear, military, gas, oil, petrochemical, chemical and other industries.

Nominal diameter DN, mm

10…150

Operating pressure, Po MPa

up to 25,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т, Ст20, 15Х1М1Ф, 12Х1МФ, 09Г2С, 10Х17Н13М3Т

Sealing

bellows, bellows with double sealing

Body

coaxial, with offset branch pipes, straight-through, angular

Control

handle, remote, electric drive

Connection

weld, flange, nipple

Safety class

4 NP-001, 3, 4 NP-022, NP-016

Product image: High pressure shut-off bellows valves series КЗО

Distribution valves series КТХ

ТУ 3742-002-57180370-2004

Valve: КТХ

Purpose

The valves are intended for installation as devices switching the direction of flow of a medium or mixing different flows of media on technological lines in the military, gas, oil, petrochemical, chemical and other industries.

Nominal diameter DN, mm

10…50

Operating pressure, Po MPa

up to 40,0

Operating temperature, To °C

up to 200

Material

12Х18Н10Т, Ст20, 09Г2С, 10Х17Н13М3Т

Sealing

gland

Body

with three branch pipes

Control

handle, remote, electric drive

Connection

weld

Safety class

4 NP-001, NP-022, NP-016

Product image: Distribution valves series КТХ

Safety valves series ПКП

ТУ 3742-001-57180370-2010

Valve: ПКП

Purpose

These valves are designed for installation as devices protecting equipment from pressure exceeding the permissible limit on process lines of Class 4 nuclear power plants in the military, gas, oil, petrochemical, chemical, and other industries. Designs are available with the working fluid supplied through a side branch pipe and discharged through a lower branch pipe.

Nominal diameter DN, mm

6…200

Operating pressure, Po MPa

up to 25,0

Operating temperature, To °C

up to 450

Material

Ст20, 08Х18Н10Т, 15ХМ

Sealing

bellows, gland

Body

angular, coaxial

Control

automatic

Connection

flange

Safety class

4 NP-001, 3, 4 NP-022, NP-016

Safety valves series ПКМ

ТУ 3742-100-57180370-2018

Valve: ПКМ 53085, 53062

Purpose

These valves are designed to protect equipment from pressure exceeding the permissible limit on process lines of nuclear power plants (NPPs) operating in safety classes 2 and 3 They are available in designs with the working fluid supplied through a side branch pipe and discharged into a lower branch pipe, as well as in a classic design with the fluid supplied through a lower branch pipe.

Nominal diameter DN, mm

15…50

Operating pressure, Po MPa

up to 13,0

Operating temperature, To °C

up to 200

Material

Ст20, 08Х18Н10Т

Sealing

bellows

Body

angular

Control

automatic

Connection

flange

Safety class

2, 3 NP-001, NP-022, NP-016

Axisymmetric check valves series АКЗ

ТУ 3742-015-57180370-2025

Valve: АКЗ 0401, 0405, 0406

Purpose

The valves are designed for use in nuclear power plant systems, in manned areas and in the sealed enclosure of nuclear power plants and other nuclear facilities, in order to prevent backflow of the working medium.

Nominal diameter DN, mm

10…50 (0401), 10…150 (0405), 50…300 (0406)

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т, Ст20

Body

axisymmetric

Control

automatic

Connection

weld

Safety class

2, 3 NP-001, NP-022, NP-016

Product image: Axisymmetric check valves series АКЗ

Check valves with lifting slide series АКЗ

ТУ 3742-023-57180370-2025

Valve: АКЗ 0402, 0403, 0404

Purpose

The valves are designed for use in nuclear power plant systems to prevent backflow of the working medium.

Nominal diameter DN, mm

10…50

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т, Ст20

Sealing

bellows

Body

with offset branch pipes, coaxial, straight-through

Control

automatic

Connection

weld

Safety class

2, 3 NP-001, NP-022, NP-016

Product image: Check valves with lifting slide series АКЗ

Check valves series АКЗ

ТУ 3742-024-57180370-2025

Valve: АКЗ 0407, 0408

Purpose

The valves are designed for use in systems important for the safety of nuclear power plants, in order to prevent backflow of the working medium.

Nominal diameter DN, mm

50…300

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

up to 350

Material

08Х18Н10Т, Ст20

Body

coaxial

Control

automatic

Connection

weld

Safety class

2, 3 NP-001, NP-022, NP-016

Impulse protective device (IPU) САОЗ ПКО

ТЗ 3742-006-57180370-2025

Valve: ПКО 0523-025/032

Purpose

The IPU is designed to protect the hydraulic capacity of the emergency cooling system from exceeding preset pressure values by automatically releasing the medium from the hydraulic capacity.

Nominal diameter DN, mm

25/32

Operating pressure, Po MPa

6,5

Operating temperature, To °C

up to 150

Material

08Х18Н10Т

Control

automatic

Connection

weld

Safety class

2 NP-001

Product image: Impulse protective device (IPU) САОЗ ПКО

Impulse protective device (IPU) СП ЗАЗ / СН ПКН

ТЗ 3742-007-57180370-2025

Valve: ПКН 0525-100/100

Purpose

An impulse protection device (IPU) designed for automatic discharge of the working medium in the event of an emergency increase in pressure above the established value in the equipment and pipelines of the NPP system.

Nominal diameter DN, mm

100/100

Operating pressure, Po MPa

1,0 … 4,0

Operating temperature, To °C

up to 250

Material

08Х18Н10Т

Control

automatic

Connection

weld

Safety class

2, 3 NP-001

Product image: Impulse protective device (IPU) СП ЗАЗ / СН ПКН

Impulse protective device (IPU KD)

ТЗ 3742-008-57180370-2025

Valve: ПКД 0524-100/100

Purpose

Impulse protective device (IPU) is designed to protect equipment and pipelines of the primary circuit of the reactor plant from pressure exceeding the permissible level (safe for operation of the reactor plant) by reducing the pressure in the primary circuit by diverting the medium from the pressure compensator to the bubbler.

Nominal diameter DN, mm

100/200

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

350

Material

08Х18Н10Т

Control

automatic

Connection

weld

Safety class

2 NP-001

Product image: Impulse protective device (IPU KD)

Check valves and gate valves series ОКЗ

ТУ 3742-014-57180370-2017

Valve: ОКЗ

Purpose

The valves are designed for installation on pipelines of general industrial process systems in the nuclear, military, gas, oil, petrochemical, chemical and other industries in order to automatically prevent backflow of the working medium.

Nominal diameter DN, mm

10…300

Operating pressure, Po MPa

up to 20,0

Operating temperature, To °C

up to 350

Material

12Х18Н10Т, Ст20, 09Г2С,10Х17Н13М3Т, 15ХМ

Body

coaxial, with offset branch pipes, axisymmetric

Control

automatic

Connection

weld, flange, nipple

Safety class

4 NP-001, 3, 4 NP-022, NP-016

Product image: Check valves and gate valves series ОКЗ

Pressure regulators after itself the series Д

ТУ 3742-022-57180370-2018

Valve: Д21051

Purpose

The valves are designed to maintain pressure at a specified level downstream of them on process pipelines of nuclear power plants of the 4th safety class.

Nominal diameter DN, mm

20…50

Operating pressure, Po MPa

up to 4,0

Operating temperature, To °C

up to 250

Material

08Х18Н10Т, Ст20

Sealing

bellows

Body

coaxial

Control

automatic

Connection

flange

Safety class

4 NP-001, NP-022, NP-016

Product image: Pressure regulators after itself the series Д

Special sewerage fittings series СК

ТУ 3742-020-57180370-2018

Valve: СК58500

Purpose

The special sewerage fittings are designed to receive water and solutions that fall onto the floor of the premises as a result of unorganized leaks due to leaks in the radioactive circuit of the nuclear power plant, and to prevent air communication between premises connected to each other using special sewerage pipelines.

Nominal diameter DN, mm

50…150

Material

08Х18Н10Т, Ст20

Body

with bottom and side outlet

Control

automatic, faucet, remote

Connection

weld

Safety class

3, 4 NP-001, NP-022, NP-016

Product image: Special sewerage fittings series СК

Remote control line (ДЛУ)

ТЗ 3742-025-57180370-2025

Valve: ДЛУ 0209-015M1

Purpose

It is used as an independent remote control line as part of the Impulse protective device (IPU) KD.

Nominal diameter DN, mm

15/25

Operating pressure, Po MPa

20,0

Operating temperature, To °C

350

Material

08Х18Н10Т

Control

electric drive

Connection

weld

Safety class

2 NP-001

Product image: Remote control line (ДЛУ)

Disconnecting device for impulse lines

ТЗ 3742-026-57180370-2025

Valve: КОЛ 0209

Purpose

The impulse line isolation device is intended for automatic shut-off in the event of leakage exceeding the set response flow rate in the pipeline downstream of the device, as well as for limiting the medium flow in the event of leakage and failure of the isolation device in nuclear power plant systems.

Nominal diameter DN, mm

10, 15

Operating pressure, Po MPa

20,0

Operating temperature, To °C

350

Material

08Х18Н10Т

Control

automatic

Connection

weld

Safety class

2, 3 NP-001

Product image: Disconnecting device for impulse lines

Air intake and exhaust valves for cooling systems КВО

ТУ 3742-029-57180370-2018

Valve: КВО 5007

Purpose

The valves are designed to remove (release) air from the cooling system of important consumers during the filling of the system with water when starting the pump of important consumers and to admit air into the system when stopping the pumping unit, when rapid emptying of the system pipelines occurs.

Nominal diameter DN, mm

50…100

Operating pressure, Po MPa

up to 1,0

Operating temperature, To °C

up to 60

Material

08Х18Н10Т, Ст20

Body

axisymmetric

Control

automatic

Connection

weld

Safety class

3, 4 NP-001, NP-022, NP-016

Product image: Air intake and exhaust valves for cooling systems КВО

Products manufactured to customer drawings

Parts and assemblies for BZOK control valves
Control elements for steam generator IPU
Throttle devices
Steam filters
High-pressure machined bends and tees
Butterfly valves

Production Capabilities

Design
Comprehensive development and launch of products into production in full compliance with the requirements of operating and design organizations, including the requirements of foreign customers. Our product line includes the most widely used types of valves at power facilities.
Technologies
A full manufacturing cycle for all parts and assemblies at our own production facilities using unique technologies and special processes. A professional team of qualified technologists and engineers with over 25 years of experience in developing specialized pipeline valves.
Manufacturing
Modern machining workshops equipped with advanced high-tech metalworking equipment, state-of-the-art welding, cladding and heat treatment production. Digitalized production flow management and implementation of production system tools from leading corporations ensure the most comfortable delivery times for customers.
Testing
Ensuring stable quality is the company’s top priority. Every product undergoes control and testing at our own accredited laboratory and testing complex at all stages of the product life cycle. The entire serial range of our pipeline valves is certified.