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Safety Relief Valves Manufacturer

Cryogenic LNG Hydrogen Boilers Pharmaceutical Chemical Petrochemical Naval Energy

Coi Technology


We have two series of safety valves:

  • SLK series for compressible fluids
  • GLV series for incompressible fluids

User & maintenance manual for safety valves

The manual is available in the following languages:



We are manufacturer, so we can make all kinds of connections


Each safety valve has its own material


The accessories finish off your safety valve

Coi Technology has been designing and manufacturing safety relief valves for the last 40 years

Mission Statement

For us, quality is everything. In fact, our safety valves are only made from bar, the material of which is strictly controlled. On request, we carry out PMI tests before and after processing.

Product Engineering

Coi Technology’s product development is aimed at ensuring maximum safety while providing the same quality in the construction phase and the best technical assistance in the quotation phase.

Customer Support

Coi Technology provides its know-how and its CNC machines to satisfy all those customers who need flexibility and customisation of safety valves.

All our safety valves have full nozzle and are available with threaded or flanged connections

Coi Technology

main fields of applications

Coi Technology’s safety valves are used for the protection of the following plants:

  • Boilers and autoclaves
  • Chemical
  • Compressed air
  • Dosing pumps
  • Firefighter systems
  • Hydrogen generation plants
  • Industrial refrigerators
  • LNG / CNG compressors
  • Naval
  • Petrochemicals / oil & gas
  • Pharmaceutical
  • Power & energy
  • Technical gases / cryogenics plants
  • Water treatment

Our technical staff, with its know-how and many years of experience in the field, is always open to all forms of cooperation in the study and research of improved quality solutions which may be more economical for the customer.

Coi Technology offers accurated and qualified support by providing its customers with its vast experience in the production of safety relief valves

Coi Technology

products engineering

Coi Technology focuses its attention on the continuous search for new materials to use in its production.

In recent years, plastic materials have undergone significant development, and Coi Technology has included a series of C-PVC, PVC, PP, PVDF and PTFE valves in its standard production.

Coi Technology, with its team of engineers, is always looking for new solutions to fully meet the most demanding market requirements.

Request a quotation

Open the online quotation form

Click on the 'valve configuration' button in the top right-hand corner

Company data

Please fill the form with your company details so we can send you the quotation via email.

Select the type of quotation

Are you looking for a new valve, a replacement or spare parts?

Technical data

Fill in all the technical data required to supply the right safety valve for you


Please tell us which standard you need the valve for: EN 4126 or API 520


Select the third-part certification you need: INAIL, RINA, etc.

Coi Technology

CNC machines

Coi Technology’s production department is equipped with the most modern and sophisticated CNC machines that are able to produce stainless steel parts, titanium, brass, bronze and other materials such as Duplex, Hastelloy, Incoloy, Monel, etc. always maintaining a constant high standard of quality.

Coi Technology


Since the introduction, in June 2002, of the new directive “PED 2014/68/EU” Coi Technology has adjusted the production of all its safety valves in line with this directive.

Our safety relief valves have been CE approved. All performance tests necessary for obtaining approval (PED) were performed within the experimental facilities of the Milan Polytechnic and in close cooperation with its staff as well as under the inspection of the certification body TUV (Germany).

These tests reconfirmed the excellent performance of our safety valves certifying a high flow coefficient. Coi Technology has always privileged the quality of its products by promptly applying all applicable regulations.

Coi Technology


Germany - Düsseldorf

Valve World Expo

Italy - Piacenza

Hydrogen Expo

Coi Technology

projects and special executions

The main purpose of our project implementation is the satisfaction of our customers.

During the initial project phase, our technical staff will evaluate the best type of material, taking into account the best price-quality ratio, in order to offer the best safety valve support.

Coi Technology

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