Knife Gate Valve 104

DN50-1000 PN10-16
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Comprehensive Documentation
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Zasuwa nożowa kat.104

Technical Specifications

  • Nominal diameter DN 50-1000
  • Nominal pressure PN10-16
  • Medium temperature -30 °C ... +200 °C
  • Types of Valve End Connections Wafer, lug
  • 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
500 670 620 585 114 20-M24
600 780 725 685 114 20-M27

Tabular values for diameters DN700–DN1000 and for pressure PN16 are available upon request

Product Description

Knife Gate Valve Model 104 is equipped with a dismountable, two-piece body and a U-shaped seat.

During valve opening, the seal conforms to the internal contour of the body, ensuring full flow-through without stagnation zones. This design prevents fine abrasive particles from entering the valve’s “gate pocket,” resulting in high cycling performance and long service life.

Design Features:

  • End seal providing bi-directional tightnes
  • Two-piece dismountable body
  • Wide selection of body and sealing materials
  • During valve opening, the seal adapts to the body cross-section, ensuring unrestricted flow without stagnation areas

Working Media:

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

Body Materials:

🔹 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 Materials:

  • EPDM
  • NBR
  • FKM (Viton)
  • Metal-to-metal
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