How it works
Knife gate
The number that matters
Nominal pressure
10bar
The pressure class of the valve body at 20 °C. Working limits depend on the medium and its temperature.
Construction
Parts and materials
The gate valve is designed to be installed on the pipeline as a shut-off device and regulate the flow of medium in water supply systems (except drinking water supply systems) and chemical industry. The principle of operation of the gate valve is to move the gate (knife) perpendicular to the flow of medium. The flow is stopped when the diameter of the nominal bore of the pipeline is completely blocked, and adjusted when it is partially blocked.
Overall and installation dimensions DNOVA GVKN1331N-2W-Fb-ISO knife gate valves, body material - cast iron GGG40, knife material - stainless steel AISI 304, seal - NBR, stem only:
| DN | L, mm | D, mm | D1, mm | D2, mm | D0, mm | H1, mm | T, mm | d, mm | ● | O | N-Th, mm |
| 150 | 57 | 285 | 240 | 211 | 250 | 490 | 14 | 23 | 2 | 6 | 8-M20 |
| 250 | 70 | 395 | 350 | 319 | 250 | 690 | 16 | 23 | 4 | 8 | 12-M20 |
| 300 | 76 | 445 | 400 | 370 | 250 | 815 | 16 | 23 | 4 | 8 | 12-M20 |
| DN | D3, mm | D4, mm | D5, mm | n-Ød, mm | L1, mm | A, mm | B, mm |
| 150 | 125 | 102 | 70 | 4 – Ø12 | 48 | 6 | 20 |
| 250 | 125 | 102 | 70 | 4 – Ø12 | 48 | 6 | 20 |
| 300 | 125 | 102 | 70 | 4 – Ø12 | 48 | 6 | 20 |
Materials of DNOVA GVKN1331N-2W-Fb-ISO gate valves, body material - cast iron GGG40, knife material - stainless steel AISI 304, seal - NBR, stem only:
| № | Part name | Material |
| 1 | Body | cast iron GGG40 |
| 2 | Seat seal | NBR |
| 3 | Schieber | SS304 stainless steel |
| 4 | Guide seal | PTFE |
| 5 | Seal | PTFE |
| 6 | Gland packing | WCB steel |
| 7 | Nut | brass |
| 8 | Rod | 2Cr13 steel |
| 9 | Rack | steel Q235 |
| 10 | Rack top plate | cast iron QT450 |
| 11 | Bearing | GCr15 steel |
| 12 | O-ring | NBR |
- Body material
- Cast iron GGG40
- Stopper Material
- stainless steel AISI 304
- Maximum allowable temperature
- 110 °C
- Connection type
- Compact flanged
- Control type
- Stem only
- Gate valve type
- Knife Gate Valve
- Nominal pressure
- 10 bar
- Type of seal
- NBR
- Country of origin
- China
Production. Usually 7–14 business days after you approve the quotation and pay. Made-to-specification items are confirmed in the quotation.
Freight. Not charged at checkout. A manager quotes air and sea freight to your port or airport, and nothing ships until you approve the price and the freight.
To North America. From approval and payment to the destination port or airport: air 14–24 days, sea 32–60 days. Estimates, not guarantees.
Terms. EXW Ningbo or FOB Ningbo Port; CIF on request. The agreed term is written on the Proforma Invoice.
Total items
Product subtotal