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Mostro Valves

Nuclear power engineering

 - V65

Three-way valve V65

DN 200 – 350

Technical description

Body made of open-die forging with welded-on ends, cast yoke. The seat at the outlet to the high-pressure heater is pressed into the body and secured with a seal weld. The seat for the bypass branch is provided with holes and forms one piece with the pressure seal bonnet. Sealing surfaces of the seats and plug hard-faced with a hard-facing alloy. Stem packing and pressure seal bonnet sealing ring made of asbestos-free material. Operated by an electric actuator.

Image gallery

Drawings and dimensions

Application

Shut-off valve used for the automation and operation of a power unit, particularly in the event of a tube failure in the high-pressure heater and when the water level rises above the permitted limit.

Operation

Operated by an electric actuator.

Testing

The valves are tested with water (or steam at the customer's request) for strength, body tightness, operability and seat tightness. The minimum test pressure is 1.5 times PN.

Installation

Dimensions

Dimensions
DNPNØ DØ D´B + CHLS/S 1V lkg
200/200/200100 ÷ 40020020011403959001761265910
225/225/175225175500900210/21015201120
250/250/2502502501295500900210/19018701150
300/300/30030030012956801100310/43027203800
350/350/3503503506801100310/43021803850

Connection

Butt-welded according to ČSN, DIN, EN, ANSI and GOST standards. The valves can be supplied with electric actuators from ZPA Pečky, Regada, AUMA, Rotork, Schiebel and other manufacturers.

Comparison table of Czech and EN materials

Comparison table of Czech and EN materials
Czech material classCSN standardW.NrEN material class
11 416ČSN 41 16001.0425P 265 NH
15 128ČSN 41 51281.771514 MoV6-3
17 119ČSN 41 71191.4903X10CrMoVNb9-1
17 246, 17 248ČSN 41 7246 (48)1.4541X6CrNiTi18-10
15 020ČSN 41 50201.541516Mo3
15 121ČSN 41 51211.733513CrMo4-5

Documentation

Operating parameters

Operating parameters – PN (bar) depending on temperature (°C) and body material
PNTemperature (°C)
20200250300350400450500520540560580600610620630640650
11 416
636,36,35,54,84,13,52
10010108,87,66,55,63,2
160161614,112,210,595,1
250252522,019,116,414,28,1
32032322825211815
40040403531262318
C22.8
636,35,64,94,23,62,92,1
100108,97,86,65,84,63,4
1601614,312,510,69,27,45,5
2502522,419,516,614,411,58,7
3203228,725,021,318,514,811,1
4004035,931,326,623,118,513,9
P 285 NH
636,35,44,73,62,92,2-
100108,57,45,74,53,4-
1601613,611,99,17,25,5-
2502521,318,614,211,38,6-
15 128525
636,36,15,24,42,8
100109,88,27,04,5
1601615,613,39,07,2
2502524,420,714,011,3
3203231241915
4004039302318
16Mo3 / 15Mo3
636,36,05,25,14,94,73,32,1
100109,58,48,17,87,55,33,4
1601615,313,412,912,5128,65,4
2502523,92120,219,518,813,48,5
3203231272625241711
4004038343331302214
PNTemperature (°C)
20200250300350400450500520540560580600610620630640650
13CrMo4-5
636,36,05,84,64,12,81,81,2
100109,59,28,77,95,43,52,3
1601615,314,814,312,78,75,63,7
2502523,923,122,419,813,68,85,8
320323130282717117,4
400403837353422149,3
10CrMo9-10
636,34,93,72,82,11,61,2
100107,85,94,53,32,51,9
1601612,59,57,25,34,03,1
2502519,514,911,38,46,34,9
32032252015118,26,3
4004032251814107,9
X10CrMoVNb9-1
636,35,24,23,2
100108,46,65,2
1601613,410,68,3
250252116,613
32032282217
40040352822
X6CrNiTi18-10
636,35,75,354,74,64,44,34,34,34,33,93,1
100109,08,47,97,57,27,06,96,96,86,76,25
1601614,413,412,612,011,611,311,011,010,910,89,98
2502522,421,019,718,818,117,517,317,317,217,115,512,5
X10CrWMoVNb9-2
320323226211916141210
400404033262320171513

Materials of main parts

Materials of main parts by operating temperature (°C)
Pos.Part identificationOperating temperature (°C)
450530550560570600650
002BodyP 250 GH P 285 NH 11 41615NiCuMoNb516Mo313CrMo4-510CrMo9-10 15 128X10CrMoVNb9-1X10CrWMoVNb9-2
003Body ends
014Pressure seal bonnet10CrMo9-1010CrMo9-10
039Segmented ring
015StemX39CrMo17,17 134X22CrMoV12-1
012Yoke10CrMo9-10,15 128 GS-17CrMo5-5,42 27 44
013Sealing cover
033Stem nutP250GH, bronze alloy
053Sealing ringExpanded graphite

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