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Eccentric Hemisphere Valve

Eccentric Hemisphere Valve

Size: DN40-1600
Pressure: PN1.0MPa-PN4.0MPa
Material: WCB
Flange connection: GB/T17241.6-1998、GB/T9115
Structure length: GB12221-89
Temperature level: -29 ~ 540℃
Connection Method: Flanged/ Wafer
Medium: Water, Acid, Slurry, Steam, Gas, Oil

Product Overview

An eccentric hemisphere valve is a high-performance control valve designed for slurry, fibre-laden, and solid-containing media. Its eccentric hemispherical core and spring-loaded metal seat create a shear and self-cleaning effect, preventing jamming, buildup, and leakage while ensuring tight shut-off and long service life. With high flow capacity, low pressure loss, and near equal-percentage flow characteristics, the eccentric hemisphere valve is ideal for precise regulation in pulp & paper, chemical processing, wastewater, mining, and industrial pipelines handling water, steam, oil, acids, and abrasive fluids.

Product Features

  • Eccentric hemispherical design for low friction and long service life
  • Metal-to-metal sealing suitable for abrasive and slurry media
  • Low operating torque, ideal for large-diameter valves
  • Self-cleaning action reduces clogging and maintenance
  • Reliable shut-off under high pressure and harsh conditions

Specification Parameters

Item0.6 MPa1.0 MPa1.6 MPa2.5 MPa4.0 MPa
Nominal Pressure (MPa)0.61.01.62.54.0
Nominal Diameter (mm)40 – 160040 – 160040 – 120040 – 60040 – 600
Seat Leakage Test Pressure (MPa)0.661.11.762.754.4
Shell Test Pressure (MPa)0.91.52.43.756.0
Applicable Temperature (°C)-29 to 540℃
Applicable MediaClean water, seawater, waste water, acidic, slurry, steam, gas, oils
Actuation TypeManual, Electric, Pneumatic
End ConnectionFlanged, Wafer (Lug-type optional if required)
Installation OrientationVertical installation, Horizontal installation

eccentric_hemisphere_valve_drawing

Main Overall Dimensions (mm)- National Standard (PN16):

DNLDD1D2Cfn-Φd
1002292201801582028-Φ18
1252542502101882228-Φ18
1502672852402122228-Φ22
20029234029526824212-Φ22
25033040535532026212-Φ26
30035646041037828212-Φ26
35045052047042830216-Φ26
40053058052549032216-Φ30
45058064058555040220-Φ30
50066071565061044220-Φ33

American Standard (Class 150LB):

DNDD1D2Cfn-Φd
100230190.5157.224.328-Φ18
125255215.9185.724.328-Φ22
150280241.3215.925.928-Φ22
200345298.5269.929.028-Φ22
250405362.0323.830.6212-Φ26
300485431.8381.032.2212-Φ26
350535476.3412.835.4212-Φ30
400595539.8469.937.0216-Φ30
450635577.9533.440.1216-Φ33
500700635.0584.243.3220-Φ33

Specification Applications

  • Mining and mineral processing – slurry, tailings, and abrasive media control
  • Coal chemical and metallurgy industries – solid-laden and high-wear fluids
  • Power plants – ash handling, desulphurisation, and high-pressure services
  • Water and wastewater treatment – sludge, grit, and dirty water isolation
  • Chemical processing – corrosive or particulate-containing media
  • Pulp and paper industry – fibrous and high-consistency fluids

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