Knife gate valve 101 – unidirectional, one-piece body
Technical Specifications
Nominal diameter DN 50-1400- Nominal pressure PN10-PN16
- Medium temperature -60 °C ... +300 °C
- Types of Valve End Connections Wafer, lug
- Leakage Class «А»
- Mounting Position Any, except for the actuator facing downward
- Types of Control — manual (lever) —manual (handwheel)— manual (gearbox)— pneumatic actuation — electric actuation
- Warranty Period 12 months
- Average Service Life 2500 cycles
- Guaranteed Service Life Not less than 1000 cycles
Technical Drawings and Dimensions
Basic Dimensions Table
| DN | D, mm | D1, mm | D2, mm | L, mm | n-ød |
|---|---|---|---|---|---|
| 50 | 165 | 125 | 102 | 48 | 4-M16 |
| 65 | 185 | 145 | 122 | 48 | 4-M16 / 8-M16 |
| 80 | 200 | 160 | 138 | 51 | 8-M16 |
| 100 | 220 | 180 | 158 | 51 | 8-M16 |
| 125 | 250 | 210 | 188 | 57 | 8-M16 |
| 150 | 285 | 240 | 212 | 57 | 8-M20 |
| 200 | 340 | 295 | 268 | 70 | 8-M20 |
| 250 | 395 | 350 | 320 | 70 | 12-M20 |
| 300 | 445 | 400 | 370 | 76 | 12-M20 |
| 350 | 505 | 460 | 430 | 76 | 16-M20 |
| 400 | 565 | 515 | 482 | 89 | 16-M24 |
| 450 | 615 | 565 | 532 | 89 | 20-M24 |
| 500 | 670 | 620 | 585 | 114 | 20-M24 |
| 600 | 780 | 725 | 685 | 114 | 20-M27 |
Tabular values for diameters DN700–DN1400 and for pressure PN16 are available upon request
Product Description
Knife gate valve model 101 is a unidirectional isolation valve for industrial pipelines. Its one-piece body and full-bore flow passage are suitable for liquids containing suspended solids. Body material options include ductile iron, carbon steel, stainless steel and duplex stainless steel.
The seat arrangement is selected for the required sealing performance and process conditions. Available options include elastomeric or metal-to-metal seating, a gate scraper, an inlet deflector and a bottom flushing connection. Install the valve according to the direction marked on the body.
Available configurations
- Size range: DN 50–1400;
- Connections: wafer or lug, with PN10 or PN16 flange drilling;
- Body: one-piece construction;
- Sealing direction: unidirectional;
- Seat: elastomeric or metal-to-metal;
- Operation: handwheel, gearbox, pneumatic or electric actuator;
- Stem: rising or non-rising, depending on the configuration.
Seat and service options
- Soft seat: elastomeric sealing for tight shut-off;
- Seat retaining ring: secures the elastomeric seat within the body;
- Metal-to-metal seat: for applications requiring metal seating, with the specified leakage rate;
- Gate scraper: optional removal of material adhering to the gate;
- Inlet deflector: optional protection against direct wear from solids;
- Bottom flushing connection: helps remove accumulated material from the lower body cavity.
Process media
Water, condensate and other industrial liquids containing suspended solids. The standard catalogued configuration is intended for liquids with up to 5% suspended solids. Suitability for steam, petroleum products, chemicals, gases or more demanding abrasive service depends on the selected body, gate, seat and packing materials, together with the operating pressure and temperature.
Material options
| Component | Material | EN designation |
|---|---|---|
| Body | ||
| Ductile iron | GGG40 | EN-GJS-400-15 |
| Cast carbon steel | ASTM A216 WCB | GP240GH (1.0619) |
| Cast stainless steel | ASTM A351 CF8 / CF3 | 1.4308 / 1.4309 |
| Cast stainless steel | ASTM A351 CF8M / CF3M | 1.4408 / 1.4409 |
| Duplex / Super duplex | Cast grade selected for the configuration | According to specification |
| Gate | ||
| Stainless steel | AISI 304 / 316 / 316L / 316Ti | 1.4301 / 1.4401 / 1.4404 / 1.4571 |
| Seat | ||
| Elastomeric | EPDM / NBR / FKM | Selected for the medium |
| Metal | Metal-to-metal | Selected for the service |
Body, gate, seat and packing materials are selected for the operating conditions. The material combination and operating limits are specified in the valve datasheet.
Maximum shut-off differential pressure
| Nominal size | Maximum ΔP |
|---|---|
| DN 50–250 | 10 bar |
| DN 300–400 | 6 bar |
| DN 450 | 5 bar |
| DN 500–600 | 4 bar |
| DN 700–1400 | According to the selected configuration |
The values shown apply to the catalogued configuration. Higher operating pressure or shut-off differential pressure versions are available on individual request, with operating limits specified for the application.
Sealing and temperature
Soft-seated variants are specified for leakage Rate A according to ISO 5208. The catalogued metal-to-metal seat variants have leakage Rate D.
The series temperature range is −60°C to +300°C. The permissible temperature range of each valve depends on its body, gate, seat and packing materials, together with the operating pressure.
Valve selection
Send your specification or enquiry with the required size, operating pressure, shut-off differential pressure, temperature, medium and actuation. Zondex will select the suitable materials and provide a technical datasheet and dimensional drawing.
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