Bellows globe valve

Bellows globe valve

Bellows globe valve

Type:WJ41Y/WJ41H/WJ41F
Subtitle:Anti-leakage valve
Our bellows sealed globe valve provides zero-emission performance for hazardous, toxic or expensive media. The double-walled metallic bellows design eliminates stem leakage, making it ideal for chemical processing, LNG, and nuclear applications where fugitive emissions are unacceptable.

Product Overview

Our bellows sealed globe valve provides zero-emission performance for hazardous, toxic or expensive media. The double-walled metallic bellows design eliminates stem leakage, making it ideal for chemical processing, LNG, and nuclear applications where fugitive emissions are unacceptable.

Key Features

1. Leakproof Stem Sealing

  • Dual-layer 316L stainless steel bellows (10,000+ cycles)
  • Secondary graphite packing as backup seal
  • 100% helium leak tested per ISO 15848

2. Precision Flow Control

  • Parabolic plug design for accurate Cv characteristics
  • Equal percentage flow characteristic
  • Micro-adjustment capability (±1% accuracy)

3. Rugged Construction

  • Integral bonnet design (no gasket leakage points)
  • Forged body materials from ASTM A105 to F316
  • Live-loaded packing for constant sealing force

FeatureBellows Globe ValvePacked Stem Globe ValveDiaphragm ValveDouble Block & Bleed (DBB) Valve
Stem SealingMetal bellows (0 ppm leakage)Graphite packing (≤500 ppm)Elastomer diaphragmDual packing/seats
Emission ControlZero fugitive emissionsPossible leakage over timeLow leakage riskModerate leakage risk
Temp Range-196°C to 450°C (-320°F to 842°F)-29°C to 250°C (-20°F to 482°F)0°C to 180°C (32°F to 356°F)-29°C to 200°C (-20°F to 392°F)
Pressure RatingUp to Class 2500 (PN420)Up to Class 1500 (PN260)Up to Class 300 (PN50)Up to Class 1500 (PN260)
Flow ControlPrecision throttling (equal %)Good regulationLimited controlOn/Off only
Maintenance10+ years service lifeFrequent packing replacementDiaphragm wearSeal replacement needed
Best ForToxic/expensive media, high-pressure steam, cryogenicsGeneral purposeCorrosive/ultra-clean fluidsIsolation with bleed function

Product Parameters

Size Range½" to 18" (DN15 to DN450)
Pressure RatingClass 150 to 600 (PN10 to PN40)
Temperature Range-196°C to 450°C (-320°F to 842°F)
Bellows Material316L/INCONEL 625
End ConnectionsRF, RTJ

Summarize

The bellows globe valve represents the gold standard in emission control, combining metal bellows technology with precision flow regulation. Its dual-seal design ensures absolute containment of dangerous media while providing exceptional throttling performance – making it the ideal choice for critical processes where safety and reliability are paramount.

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