Technical description
Body made of closed-die forging with straight-through ends, the screwed bonnet is threaded into the body, the plug, stem and bellows form one unit. Sealing surface of the plug hard-faced with a cobalt-free hard-facing alloy; the seat in the body is not hard-faced. Stem sealed with a multi-ply bellows with back-up packing. Body sealed with a sealing ring made of asbestos-free material.
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Drawings and dimensions
Application
Globe valve intended for radioactive water, steam, gases and all other media, particularly in primary, secondary and auxiliary circuits of nuclear power plants and chemical plants, for installation inside or outside the containment, seismically resistant.
Operation
Handwheel operation. Valves with a handwheel can be equipped with a locking device.
Testing
The valves are tested with demineralised water for strength and tightness at a minimum of 1.6 times Pp, with air for operability and seat tightness at Pp and for vacuum tightness with helium at a vacuum of 5·10⁻¹ Pa. No indication greater than 1·10⁻⁵ Pa·l·s⁻¹ is permitted.
Installation
The valves can be installed in any position with the flow under the plug.
Connection
Butt-welded according to ČSN and GOST standards.
Documentation
Operating parameters
| Pp (MPa) | Temperature (°C) | |||||
|---|---|---|---|---|---|---|
| 200 | 300 | 350 | 400 | 500 | 550 | |
| Body material | ||||||
| 08Cr18Ni10Ti, X6CrniTI1810 | ||||||
| Acceptable operating pressure MPa | ||||||
| ÷ 20 | 20 | 20 | 18 | - | - | - |
Materials of main parts
| Pos. | Part identification | Material |
|---|---|---|
| 102 | Handwheel | ČSN 13 7258 |
| 094 | Screw M 4x8 | ČSN 02 1146 |
| 122 | Washer 4.3 | ČSN 02 1726 |
| 055 | Dust ring | FELT |
| 095 | Sealing ring | Exp. graphite |
| 414 | Needle bearing | 1x AXK 1528, 2x AS 1528 |
| 386 | Insert | 08X18H10 |
| 059 | Screw joint | 17 027 |
| 316 | Lock nut | 17 027 |
| 033 | Stem nut | 423046 |
| 015 | Stem | 17 134 |
| 078 | Bellows complete unit | 08X18H10T |
| 012 | Yoke | 17 027 |
| 002 | Body | 08X18H10T |
Dimensions
| DN | Pp (MPa) | A | D (max) | H | L | V | kg |
|---|---|---|---|---|---|---|---|
| 8 | ÷ 20 | 75 | 22 | 16 | 80 | 90 | 0,65 |
| 10 | |||||||
| 15 | |||||||
| 15/10 |
Other
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