Technical description
Body made of open-die forging with welded-on ends, steel welded yoke. Sealing surface of the seat in the body and of the plug hard-faced with a stainless steel electrode. Stem packing and pressure seal bonnet sealing ring made of expanded graphite.
Image gallery
Drawings and dimensions
Application
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 or handwheel.
Testing
The valves are tested with water for strength and tightness at a minimum of 1.5 Pp, for operability and seat tightness at Pp. The pressure-bearing weld is radiographed.
Installation
The valves are installed only in horizontal piping with the actuator on top, according to the diagram and dimensional drawing.
Dimensions
| DN | PN | TYPE | A | B | C | H | L | V | Vl | kg | Ø D (max) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 300 | 400 | Z25 223 | - | 417 | 230 | 930 | 700 | - | 1270 | 1570 | 324 |
| Z25 221 | 450 | - | - | 1032 | - | 1510 |
| DN | PN | TYPE | A | B | C | H | L | S | V | Vl | kg | D (max) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 300 | 400 | Z25 823 | - | 417 | 230 | 513 | 950 | 300 | - | 1270 | 1605 | 324 |
| Z25 821 | 450 | - | - | 1032 | - | 1545 |
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
| Czech material class | CSN standard | W.Nr | EN material class |
|---|---|---|---|
| 11 416 | ČSN 41 1600 | 1.0425 | P 265 NH |
| 15 128 | ČSN 41 5128 | 1.7715 | 14 MoV6-3 |
| 17 119 | ČSN 41 7119 | 1.4903 | X10CrMoVNb9-1 |
| 17 246, 17 248 | ČSN 41 7246 (48) | 1.4541 | X6CrNiTi18-10 |
| 15 020 | ČSN 41 5020 | 1.5415 | 16Mo3 |
| 15 121 | ČSN 41 5121 | 1.7335 | 13CrMo4-5 |
Documentation
Operating parameters
| PN | Temperature (°C) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 520 | 540 | 560 | 580 | 600 | 610 | 620 | 630 | 640 | 650 | |
| 11 416 | ||||||||||||||||||
| 400 | 40 | 40 | 35 | 31 | 26 | 23 | 18 | |||||||||||
| C22.8 | ||||||||||||||||||
| 400 | 40 | 35,9 | 31,3 | 26,6 | 23,1 | 18,5 | 13,9 | |||||||||||
| P 285 NH | ||||||||||||||||||
| 250 | 25 | 21,3 | 18,6 | 14,2 | 11,3 | 8,6 | - | |||||||||||
| 15 128 | 525 | |||||||||||||||||
| 400 | 40 | 39 | 30 | 23 | 18 | |||||||||||||
| 16Mo3 / 15Mo3 | ||||||||||||||||||
| 400 | 40 | 38 | 34 | 33 | 31 | 30 | 22 | 14 | ||||||||||
| 13CrMo4-5 | ||||||||||||||||||
| 400 | 40 | 38 | 37 | 35 | 34 | 22 | 14 | 9,3 | ||||||||||
| 10CrMo9-10 | ||||||||||||||||||
| 400 | 40 | 32 | 25 | 18 | 14 | 10 | 7,9 | |||||||||||
| X10CrMoVNb9-1 | ||||||||||||||||||
| 400 | 40 | 35 | 28 | 22 | ||||||||||||||
| X10CrWMoVNb9-2 | ||||||||||||||||||
| 400 | 40 | 40 | 33 | 26 | 23 | 20 | 17 | 15 | 13 |
Materials of main parts
| Pos. | Part identification | Operating temperature (°C) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 450 | 530 | 550 | 560 | 570 | 600 | 650 | |||
| 002 | Body | P 250 GH P 285 NH 11 416 | 15NiCuMoNb5 | 16Mo3 | 13CrMo4-5 | 10CrMo9-10 15 128 | X10CrMoVNb9-1 | X10CrWMoVNb9-2 | |
| 003 | Body ends | ||||||||
| 014 | Pressure seal bonnet | 10CrMo9-10 | 10CrMo9-10 | ||||||
| 039 | Segmented ring | ||||||||
| 015 | Stem | X39CrMo17,17 134 | X22CrMoV12-1 | ||||||
| 012 | Yoke | 10CrMo9-10,15 128 GS-17CrMo5-5,42 27 44 | |||||||
| 013 | Sealing cover | ||||||||
| 033 | Stem nut | P250GH, bronze alloy | |||||||
| 053 | Sealing ring | Expanded graphite |
Other
Hotline
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