How it works
Knife gate
Inductive end sensors
Construction
Parts and materials
The gate valve is designed for installation on a pipeline as a shut-off device and for regulating the flow of the working medium in water supply systems (except for drinking water supply systems) and the chemical industry.
An inductive sensor is a contactless sensor designed to control the position of metal objects. It is not sensitive to other materials. Inductive sensors are successfully and widely used to solve many automation problems in manufacturing. They are manufactured with normally open and normally closed contacts, but there are options with both types of contact simultaneously. They work by changing the parameters of the magnetic field created by the inductance coil inside the sensor.
Technical characteristics of the DNOVA GVKR3431M-1W-Fb-2P DN50-400 PN10 wafer gate valves, with a retractable spindle, body - WCB steel, seal - METAL, with pneumatic actuator, WENZ and inductive sensors LJ12A3-4-J/EZ 220V:
| Name | Meaning |
| Nominal pressure PN, bar | 10 |
| Connection type | interflange |
| Working medium | water |
| Control type | pneumatic drive |
| Application | water supply, heat supply, industry |
| Gate valve type | Gate valve |
| Working environment temperature, °C | from -30 to +400 |
Sketch of the dimensions and sizes of the gate valves DNOVA GVKR3431M-1W-Fb-2P Dn50-400 10 bar interflange, with a retractable spindle, body - WCB steel, seal - METAL, with a pneumatic actuator, WENZ and inductive sensors LJ12A3-4-J / EZ 220V
Dimensions and sizes of gate valves DNOVA GVKR3431M-1W-Fb-2P Dn50-400 10 bar interflange, with a retractable spindle, body - WCB steel, seal - METAL, with pneumatic actuator, WENZ and inductive sensors LJ12A3-4-J/EZ 220V:
| Size | Dn50 | Dn65 | Dn80 | Dn100 | Dn125 | Dn150 | Dn300 | Dn400 |
| DN, mm | 50 | 65 | 80 | 100 | 125 | 150 | 300 | 400 |
| L, mm | 48 | 48 | 51 | 51 | 57 | 57 | 76 | 89 |
| D, mm | 165 | 165 | 200 | 220 | 250 | 285 | 445 | 565 |
| D1, mm | 125 | 145 | 160 | 180 | 210 | 240 | 400 | 515 |
| D2, mm | 99 | 118 | 132 | 156 | 181 | 211 | 370 | 480 |
| D0, mm | 100 | 100 | 100 | 100 | 100 | 125 | 160 | 200 |
| H1, mm | 417 | 460 | 510 | 600 | 628 | 780 | 1232 | 1528 |
| G, inch | 1/2″ | 1/2″ | 1/2″ | 1/2″ | 1/2″ | 1/2″ | 1/2″ | 1/2″ |
| N - Th | 4 – M16 | 4 – M16 | 8 – M16 | 8 – M16 | 8 – M16 | 8 – M20 | 12 – M20 | 16 – M24 |
| T, mm | 12 | 12 | 12 | 12 | 12 | 14 | 16 | 20 |
| Ød, mm | 18 | 18 | 18 | 18 | 18 | 23 | 23 | 27 |
| ⬤, mm | 4 | 4 | 4 | 4 | 4 | 4 | 6 | 10 |
| 〇, mm | - | - | 4 | 4 | 4 | 4 | 6 | 6 |
Sketch of parts and materials of gate valves DNOVA GVKR3431M-1W-Fb-2P Dn50-400 10 bar interflange, with a retractable spindle, body - WCB steel, seal - METAL, with pneumatic actuator, WENZ and inductive sensors LJ12A3-4-J/EZ 220V
Table of parts and materials of gate valves DNOVA GVKR3431M-1W-Fb-2P Dn50-400 10 bar interflange, with a rising spindle, body - WCB steel, seal - METAL, with pneumatic actuator, WENZ and inductive sensors LJ12A3-4-J/EZ 220V:
| Item No. | Details | Material |
| 1 | Frame | WCB steel |
| 2 | Gate | Stainless steel SS304 |
| 3 | Guide seal | PTFE |
| 4 | Stuffing | PTFE |
| 5 | Gland packing | WCB steel |
| 6 | Rack | steel Q235 |
| 7 | Pin | steel 45 |
| 8 | Cartridge | WCB steel |
| 9 | Stock | steel 45+Cr |
| 10 | Switch | - |
| 11 | Head of the rack | cast iron GGG40 |
| 12 | Pneumatic cylinder | - |
| 13 | Solenoid valve | - |
| 14 | Filter | - |
| 15 | Wedge | WCB steel |
Technical parameters of SC pneumatic cylinders
| Name | Meaning |
| Model | SC |
| Design | double acting |
| Working environment | compressed air |
| Damping | adjustable |
| Working pressure range, bar | 1-9 |
| Operating temperature range, °C | from -5 to +70 |
Sketch of dimensions and sizes of SC pneumatic cylinders
Dimensions and sizes of SC pneumatic cylinders
| Model | SC 100x70 | SC 100x85 | SC 100x100 | SC 100x120 | SC 100x145 | SC 125x170 | SC 200x320 | SC 250x430 |
| A, mm | 112 | 112 | 112 | 112 | 112 | 140 | 220 | 270 |
| A1, mm | 125 | 125 | 125 | 125 | 125 | 155 | 260 | 220 |
| A2, mm | 70 | 70 | 70 | 70 | 70 | 85 | 140 | - |
| A3, mm | 50 | 50 | 50 | 50 | 50 | 60 | 100 | - |
| A4, mm | 104 | 104 | 104 | 104 | 104 | 130 | 226 | - |
| h3, mm | 10 | 10 | 10 | 10 | 10 | 15 | 20 | - |
| h4, mm | 10 | 10 | 10 | 10 | 10 | 15 | 20 | - |
| NM, mm | 4-M8 | 4-M8 | 4-M8 | 4-M8 | 4-M8 | 4-M10 | 4-M14 | - |
| nd, mm | 2-Ø8.2 | 2-Ø8.2 | 2-Ø8.2 | 2-Ø8.2 | 2-Ø8.2 | 2-Ø10.2 | 2-Ø14.2 | - |
| B, mm | 112 | 112 | 112 | 112 | 112 | 140 | 220 | 270 |
| B1, mm | 75±0.5 | 75±0.5 | 75±0.5 | 75±0.5 | 75±0.5 | 95±0.5 | 105±0.5 | 220±0.5 |
| B2, mm | 32±0.5 | 32±0.5 | 32±0.5 | 36±0.5 | 36±0.5 | 42±0.5 | 48±0.5 | - |
| C, mm | 33 | 33 | 33 | 33 | 33 | 40 | 50 | - |
| D, mm | Ø100 | Ø100 | Ø100 | Ø100 | Ø100 | Ø125 | Ø200 | Ø250 |
| E, mm | 21 | 21 | 21 | 21 | 21 | 30 | 40 | 65 |
| F, mm | 6.2±0.1 | 6.2±0.1 | 6.2±0.1 | 6.2±0.1 | 6.2±0.1 | 8.2±0.1 | - | - |
| S, mm | 70±1 | 85±1 | 100±1 | 120±1 | 145±1 | 170±1 | 320±1 | 430±1 |
| H, mm | 96 | 111 | 126 | 146 | 171 | 205 | 360 | 105 |
| H1, mm | 35±1 | 34±1 | 34±1 | 28±1 | 28±1 | 33±1 | 30±1 | - |
| H2, mm | 12±0.5 | 12±0.5 | 12±0.5 | 12±0.5 | 12±0.5 | 14±0.5 | 23±0.5 | 24±0.5 |
| H3, mm | 24.5±1 | 24.5±1 | 24.5±1 | 24.5±1 | 24.5±1 | 28.5±1 | - | - |
| d1, mm | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 12.2 | - | - |
| M, mm | - | - | - | - | - | - | M27x3 | M30x3.5 |
| H4, mm | - | - | - | - | - | - | - | 650 |
Technical parameters of inductive sensors LJ12A3-4
| Name | Meaning |
| Design | cylindrical |
| Sensor type | induction |
| Current, mA | 400 |
| Operating distance, mm | 4 |
| Trigger indication | There is |
| Degree of protection, IP | 67 |
- Body material
- Carbon steel
- Connection type
- Compact flanged
- Type of seal
- Metal
- Disc material
- Stainless steel AISI 304
- Limit switches
- No
- 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