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 Dresser-Rand Gas Transmission Poppet Valves are designed
specifically for low ratio gas transmission service. This high flow rate, low speed,
low compression ratio application requires valves with extraordinarily high effective flow
area to minimize pressure drop and valve horsepower loss.
The conditions of service - low speed, pressure differential, and temperature - allowed
the designers to develop valves which have a much higher operating lift when compared to
conventional plate and straight element valves, without sacrificing reliability.
This operating lift is the design feature which provides poppet valves with high flow area
and efficiency.
Valve Reliability
Poppet Valve reliability can be attributed to the following items:
Poppet design results in low stress levels even at the maximum allowable impact velocity
and pressure differentials.
Improved durability of non-metallic compared to metallic elements.
Lower operating temperatures result in reduced poppet material property degradation for
increased strength.
Improved Poppet Head Design
Dresser-Rand nylon and Hi-Temp® PEEK poppets have been redesigned for improved
reliability and operating efficiency. Poppets are completely interchangeable with
the original design, for application in new and existing valves. The improves
geometry has a smaller head and a sloped backing, which increases head strength 30% and
valve effective flow area 15%.
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Features
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Benefits
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| Easy reconditioning |
Extends valve life |
| BHP/MMSCFD values improved up to 10% |
Minimizes horsepower |
| Interchangeable for inlet and discharge on new
units |
Reduces parts inventory |
| Stepped diameter design |
Ensures proper installation |
| Redesigned poppet head and backing |
Improves strength 30%; increases flow area 15% |
| Dynamic Valve Analysis program |
Ensures reliable valve performance and minimized
horsepower loss |
| Generous seat and stopplate porting |
Provides balanced flow areas |
| Extensive endurance and design testing |
Offers optimum endurance life and reliability |
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Poppet Valves for Gas
Transmission Upgrade |
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