Knife Gate Valve 108

DN50-800 PN10-16
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Knife gate valve model 108, DN50–DN800, PN10–PN16, features a two-piece body and a polyurethane seal.

Technical Specifications

  • Nominal diameter DN 50-800
  • Nominal pressure PN 6-16
  • Medium temperature -20 °C ... +100 °C
  • Types of Valve End Connections Welded, Socket
  • Leakage Class «А»
  • Mounting Position Any, except for downward-driven devices
  • 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

Nominal Pressure PN10

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

Tabular values for diameters DN500–DN800 and for pressure PN16 are available upon request

Product Description

Knife gate valve model 108 has a two-piece body and sealing made of polyurethane.

This design allows the valve to be used in environments with a high content of abrasive particles and significantly extends maintenance intervals. The valve geometry ensures free flow of the working medium without stagnation zones, eliminating the risk of abrasive particle accumulation in the lower part of the body.

Design features of the model:

  • Monolithic polyurethane sealing at the end, double-sided tightness
  • Detachable, two-piece body
  • Full flow
  • High resistance of the valve to environments with high abrasive content thanks to the “PU” sealing and the lack of contact between the working medium and the valve body

Operating media:

  • Water, steam, condensate
  • Alkalis
  • Acids
  • Abrasive contaminants
  • High-temperature gases
  • Petroleum products

Body material options:

🔹 Ductile iron

  • EN-GJS-400-15 / GGG40

🔹 Carbon steels

  • A216 WCB (1.0619, GP240GH)

🔹 Stainless steels (corrosion resistant)

  • A351 CF8 (1.4308) / AISI 304 / A182 F304 (1.4301)
  • A351 CF8M (1.4408) / AISI 316 / A182 F316 (1.4401)
  • A351 CF3 (1.4306) / AISI 304L / A182 F304L
  • A351 CF3M (1.4409) / AISI 316L (1.4404)
  • AISI 316Ti (1.4571)

🔹Special steels (duplex steels)

  • Duplex 2205 (UNS S31803/S32205, 1.4462)
  • Super Duplex 2507 (UNS S32750 / 1.4410)

Seat material:

  • PU
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