Products
We develop and manufacture high-pressure and medium-pressure valves for nuclear and conventional power engineering. Every product undergoes pressure tests and is supplied with complete documentation.
Valves
We offer gate valves, globe valves, check valves and pressure locks for nuclear and conventional power engineering. Choose your field of application and find the right valve.
Actuators
MOSTRO offers actuators manufactured by its parent company ZPA Pečky, a.s.
ZPA Pečky, a.s. is a company with a long tradition in mechanical and electrical engineering. It manufactures actuators, including special MODACT® actuators for operating valves in nuclear power plants, as well as actuators with gearboxes. The company has its own development, design and production base for actuators.
Pressure tests
Finished valves undergo final tests carried out according to approved procedures based on the relevant standards as well as customer requirements.
Pressure testing is based on ČSN EN 12266-1, which specifies test procedures, acceptance criteria and mandatory requirements.
Pressure tests are carried out by trained, independent quality control staff on special test benches.
Some NDT inspections are provided by the external service provider X-Ray, which has been a contract partner of MOSTRO for many years. The process also includes PMI tests using a VANTA spectrometer to verify the chemical composition of metals and alloys.
The test report is part of the valve documentation.
Other test methods:
RT
Radiographic testing
UT
Ultrasonic testing
MT
Magnetic particle testing
PT
Penetrant testing
LT-C
Leak testing – helium method
VT
Visual testing
Personnel are qualified according to ČSN EN ISO 9712-2013
We carry out and evaluate tests according to the standards:
RT
ČSN EN ISO 17636-1, 2, ČSN EN ISO 10675-1
UT
ČSN EN ISO 17 640, ČSN EN ISO 11 666
MT
ČSN EN ISO 17638
PT
ČSN EN ISO 3452-1, ČSN EN ISO 23277
LT-C
ČSN EN ISO 20485
VT
ČSN EN ISO 17637, ČSN EN ISO 5817
Russian PNAE G regulations may also be applied.
Preservation and packaging
Final preservation and packaging are carried out according to customer requirements. Paint is applied according to the location of the valve, in one or more coats. Other external surfaces are preserved with oil, and internal parts are treated with an inhibitor.
All open ends of the valves (connection ends) are protected against the ingress of foreign objects and dirt by blanking caps.
Depending on size, destination and method of transport, valves are packed on pallets, in crates or in cartons. At the customer's request, valves can also be packed in barrier aluminium foil.
Product certification
The properties of MOSTRO valves and their manufacturing process comply with international standards and fully meet the conditions and requirements of laws and regulations governing the safety of pressure equipment. The company creates the conditions for meeting the specific requirements for the application of ISO 9001:2016 by organisations in the nuclear energy supply chain that supply products and services important to nuclear safety.
The design of MOSTRO a.s. valves, including valves for conventional power engineering, provides a high level of safety and long-term operational reliability and meets the requirements of Czech legislation, i.e. Act No. 263/2016 Coll. (Atomic Act), SÚJB Decree No. 358/2016 Coll. on requirements for quality assurance and technical safety and the assessment and verification of conformity of selected equipment, SÚJB Decree No. 408/2016 Coll. on management system requirements, SÚJB Decree No. 329/2017 Coll. and Government Regulation No. 219/2016 Coll., Slovak legislation, namely ÚJD SR Decree No. 430/2011 Coll., ÚJD SR Decree No. 431/2011 Coll. and MPSVaR Decree No. 508/2009 Coll., and the normative technical documentation of the Association of Mechanical Engineers (NTD A.S.I.) for use in nuclear power plants with VVER reactors.
Certification of production processes
Production processes involving welding operations are certified according to ČSN EN ISO 3834-2. Welding supervision staff have responsibilities assigned in accordance with ČSN EN ISO 14731 and are examined and certified by the European Welding Federation (EWF). Welding personnel and welding procedures are certified according to ČSN EN ISO 9606-1, ČSN EN ISO 14732 and PED. NDT personnel are examined and certified in all methods used according to ČSN EN ISO 9712 and meet the requirements of the European Pressure Equipment Directive 2014/68/EU (PED).
Product certification
We design and manufacture our valves in accordance with the Pressure Equipment Directive 2014/68/EU (PED) and Government Regulation No. 219/2016 Coll.
Product conformity with these requirements is confirmed by a comprehensive quality assurance certificate issued by the notified body SZÚ, s.p. Brno.
Customer certification
For deliveries to nuclear power plants, we regularly undergo audits by their operators and regulatory authorities.
We are an authorised supplier to ČEZ, a.s. for nuclear power engineering and an approved supplier to Slovenské elektrárne, a.s.
We have also obtained supplier approval from the Ukrainian nuclear power plant operator NAEC Energoatom.
Hotline
Do you need advice on choosing a valve, want to order spare parts or need a service visit? Call or write to us – our engineers and sales staff will be happy to help and propose the most suitable solution.