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
Knife gate valves are a specific type of gate valve that are typically used in industries for handling tough solids and slurries. Named for their shape, knife gate valves have a sharp, knife-like gate that can cut through viscous or solid material in the flow. They are commonly used in wastewater treatment plants, paper mills, mining operations, and food industries, among others. Their primary function is to start or sop a flow or adjust its volume, but they do not control the pressure or flow rate.
Main technical characteristics of the gate valve DNOVA GVKN3431M-1W-Fb-2P, body material - Carbon Steel WCB, knife material - stainless steel AISI 304, seal - METAL, pneumatic actuator
| Nominal diameter DN, mm | 50 ÷ 400 |
| Nominal pressure of the gate valve, bar | 10 |
| Temperature of the working medium t, °C | from -30 to +400 |
| Working medium | water, slightly contaminated liquids with suspended particles content up to 5% |
| Direction of medium flow | two-way |
| Tightness class | B |
| Control type | pneumatic cylinder |
| Connection to the pipeline | interflange |
| Nominal pressure of flanges, bar | DN50÷150 – 10/16 DN200÷400 - 10 |
| Body material | WCB steel |
| Gate material | AISI 304 stainless steel |
| Application areas | heating and water supply systems, industrial pipelines. |
| Service life, years | 15 |
Overall and installation dimensions of the gate valve DNOVA GVKN3431M-1W-Fb-2P, body material - Carbon Steel WCB, knife material - stainless steel AISI 304, seal - METAL, pneumatic actuator
| DN | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
| L | 48 | 48 | 51 | 51 | 57 | 57 | 70 | 70 | 76 |
| D | 160 | 185 | 195 | 215 | 250 | 280 | 335 | 390 | 440 |
| D1 | 125 | 145 | 160 | 180 | 210 | 240 | 295 | 350 | 400 |
| D2 | 99 | 118 | 132 | 156 | 184 | 212 | 266 | 319 | 370 |
| D0 | 80 | 100 | 100 | 125 | 125 | 160 | 160 | 200 | 200 |
| d | Ø18 | Ø18 | Ø18 | Ø18 | Ø18 | Ø23 | Ø23 | Ø23 | Ø23 |
| N-Th | 4-M16 | 4-M16 | 8-M16 | 8-M16 | 8-M16 | 8-M20 | 8-M20 | 12-M20 | 12-M20 |
| H, mm | 455 | 500 | 530 | 635 | 715 | 810 | 955 | 1090 | 1225 |
| Weight | 9 | 11 | 14 | 17,5 | 21 | 29 | 41 | 62 | 75 |
Valve sketch DNOVA GVKN3431M-1W-Fb-2P, body material - Carbon Steel WCB, knife material - stainless steel AISI 304, seal - METAL, pneumatic actuator
Construction and materials of the gate DNOVA GVKN3431M-1W-Fb-2P, body material - Carbon Steel WCB, knife material - stainless steel AISI 304, seal - METAL, pneumatic actuator
| № | Part name | Material |
| 1 | Body | Carbon steel |
| 2 | Disk | Stainless steel 304 |
| 3-4 | Bolt / Nut | Steel A3 |
| 5 | Seat seal | Metal |
| 6 | gland | Steel WCB |
| 7-9 | Bolt / Nut | Steel A3 |
| 10 | Stem | Steel 2Cr13 |
| 11 | Support plates | Steel A3 |
| 12 | Bearing | ZChSnSb10-6 |
| 13 | Pneumatic actuator | - |
| 14 | Stem nut | Steel A3 |
| 15-16 | Bolt / Nut | Steel A3 |
| 17 | Support | Steel 304 |
- Body material
- Carbon steel WCB
- Stopper Material
- Stainless steel AISI 304/1.4301
- Maximum allowable temperature
- 250 °C
- Connection type
- Compact flanged
- Control type
- Pneumatic actuator
- Gate valve type
- Knife Gate Valve
- Nominal pressure
- 10 bar
- Type of seal
- Metal
- Coating type
- Epoxy powder
- 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