一.Product Introduction
DS/J61H-25, DS/J61H-40, DS/J61H-63 type water seal shut-off valve is suitable for thermal power station backwater condensing system with nominal pressure PN2.5～6.4MPa and operating temperature 0～450℃, and petroleum and chemical industry system pipelines that require isolation from the atmosphere, cut off or connect the medium in the pipeline.
二.Product Features
1. The products are designed and manufactured according to the national standard GB12235, with novel structure, reasonable material selection and beautiful appearance.The connecting end has flanges and welding, which can be matched according to different user requirements
2.The packing letter is designed to be a water-sealed structure, with 0.6~1.6Mpa water packing, low friction, good sealing, and the whole system can be isolated from the atmosphere to ensure good air tightness.
3.The valve stem is tempered and surface nitrided, which has good corrosion resistance and scratch resistance.
4.Compact structure, flexible operation, easy maintenance and long service life
5.The inverted seal is made of stainless steel threaded connection to the sealing seat or the body is surfaced with austenitic stainless steel, and the inverted seal is reliable.Packing replacement and repair can be carried out without stopping, which is convenient and fast without affecting the operation of the system
三.Technical data
| Model number | DS/J61H-25 | DS/J61H-40 | DS/J61H-63 | |
| Working pressure（MPa） | 2.5 | 4.0 | 6.3 | |
| Applicable temperature（℃） | ≤425 | |||
| Applicable media | Water, steam, oil, non-corrosive gas | |||
| Material | Valve stem | 1Cr13 or 2Cr13 | ||
| Valve body, valve cover, bracket | WCB25 | |||
| Gate, valve disc, sealing surface | Cr13 type stainless steel or cemented carbide | |||
| Seat sealing surface | Stainless steel | |||
| Stem nut | Aluminum bronze | |||
| Packing | Flexible graphite | |||
 四.The main shape and connection size
| Nominal diameter | Main dimensions and connection dimensions | ||||
| L | D | D1 | H | D0 | |
| DS/J61H-25 | |||||
| 15 | 130 | 36 | 19 | 11 | 120 |
| 20 | 150 | 44 | 26 | 11 | 140 |
| 25 | 160 | 44 | 33 | 12 | 140 |
| 32 | 180 | 48 | 34 | – | 180 |
| 40 | 200 | 55 | 40 | – | 200 |
| 50 | 230 | 64 | 50 | – | 250 |
| 65 | 290 | 82 | 65 | – | 250 |
| 80 | 310 | 94 | 78 | – | 300 |
| 100 | 350 | 117 | 97 | – | 350 |
| 125 | 400 | 144 | 122 | – | 400 |
| 150 | 480 | 170 | 148 | – | 400 |
| 200 | 600 | 220 | 197 | – | 400 |
| DS/J61H-40 | |||||
| 15 | 13 | 38 | 19 | – | 120 |
| 20 | 150 | 47 | 26 | – | 140 |
| 25 | 160 | 47 | 33 | – | 160 |
| 32 | 180 | 53 | 34 | – | 160 |
| 40 | 200 | 57 | 40 | – | 200 |
| 50 | 230 | 68 | 50 | – | 250 |
| 65 | 290 | 85 | 65 | – | 280 |
| 80 | 310 | 98 | 78 | – | 320 |
| 100 | 350 | 122 | 97 | – | 350 |
| 125 | 400 | 148 | 122 | – | 400 |
| 150 | 480 | 176 | 148 | – | 400 |