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Stem packing rings combination 

Payment Terms: T/T 
Place of Origin: Zhejiang, China (Mainland) 
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Product Detail

Model No.: dpmpacking®
Production Capacity: 10 tons per year
Delivery Date: 30 days
Style: Others
Brand Name: DPM
Means of Transport: Ocean,Land,Air
Packing: Cartons
Standard or Nonstandard: Nonstandard
Material: Graphite
Seal type: Packing

1. Two side high density end packing ring made of Graphite
2. Middle rings made of pure Graphite
3. Packing rings set for easy install

Stem special efficient sealing combination

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Stem packing rings set

Combination rings is made up of several low-density central pure graphite rings and two high density end rings (2+n form).  A specially designed central shaped ring can achieve a higher pressure coefficient compare to normal shape, improve the distribution condition of the packing compression load, selectively compress and control the radial flow of the packing material to make the packing tightly contact with shaft and seal chamber, in order to achieve more stable, more reliable and long-lasting sealing performance. 

The advantage of combination rings series

  • It is applicable under the condition of high switch frequency

  • It has better compensation ability compare to convertional flat rings

  • It has low friction coefficient which can satisfy the low torque requirements

  • It has wide chemcial adaptability

  • It can hold and resist to flushing with high pressure and high temperature

Technical Parameters

  • Temperature: -200ºC ~ +650ºC (steam)  -200ºC ~ +455ºC (atmosphere)

  • Pressure: 600bar

  • PH value: 0-14(except strong oxidizers)

  • Equipment: Valves in chemical and petrochemcial industries, the control valve of hydrocarbons, oil refinary, steam, power plants and nuclear power plants.

Available types

Combination packing rings seriesApplication feature
1100Applicable on the general valves with good sealing performance


Applicable on cryogenic valves (-200ªC)
1102This series of packing rings set passes the API622 dissipative emission test
1103This series of packing rings set fulfills the TA-Luft, VDI2440 emission request
1104This series of packing rings set satisfies the sealing requirement of ISO15848 micro leak valve

Mr. Peter Cui
 Mr. Peter Cui

Tel: +86-574-88370866
Mobile: 139 6784 8363
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Company Info


Business Type:Manufacturer, Trading Company
City: Ningbo
Province/State: Zhejiang
Country/Region: China (Mainland)

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