Poppet Damper
Poppet Damper – Series 1907
The SUDE Poppet Damper with Inlet–Outlet–Bypass is a precision-engineered flow diversion system designed to provide accurate control and isolation of hot gas or air streams in industrial process ducts. Featuring two or more circular poppet discs, the damper ensures tight sealing against machined seat rings located at the outlet and bypass ducts. Depending on its position, the damper can either direct the flow to the main outlet or reroute it through the bypass, enabling efficient flow management, precise thermal load control, and reliable system operation.
Built to withstand extreme operating conditions, SUDE’s Poppet Dampers are widely employed in gas turbines, heat recovery steam generators (HRSGs), industrial furnaces, and pollution control systems. The robust construction ensures high sealing integrity and long-term durability, even under high-temperature and high-pressure environments. These dampers can be integrated with automated actuation systems for seamless operation, offering process reliability, operational flexibility, and optimized performance in critical industrial applications.
Technical Specifications
Parameter
Configuration
Three-Port: Inlet, Outlet, and Bypass
Disc Type
Circular Poppet Plates for Outlet and Bypass Sealing
Shapes Available
Circular
Size Range
Up to 300 mm beyond 2500 mm
Flow Media
Air, Flue Gas, or Hot Process Gas
Sealing Efficiency
Up to Zero Leakage (with optional tight shut-off design)
Sealing Type
Metal-to-Metal
Temperature Range
Up to 1000°C (higher with refractory lining or Inconel construction)
Material of Construction
Carbon Steel, Stainless Steel, or High-Temperature Alloys (Inconel)
Pressure Rating
Low to Moderate Pressure Ducts
Flow Direction Control
Full Diversion Between Outlet and Bypass Paths
Drive Operations
Pneumatic / Electric / Hydraulic Linear Actuators
Position Feedback
Limit Switches, Proximity Sensors, or Smart Positioners
Testing Standards
ASME / API / ISO as applicable
Design Standards
ASME B16.34 / API 609 / ISO 5752 / Custom Design Standards
Working Principle:
Normal Flow (Outlet Open, Bypass Closed)
The main outlet poppet opens, allowing direct flow from inlet to outlet, while the bypass poppet remains closed, sealing the bypass duct.
Bypass Flow (Bypass Open, Outlet Closed)
The outlet poppet closes and bypass poppet opens, diverting flow through the bypass line — typically used for thermal relief, low-load operation, or emergency cooling.
Isolation Mode
Both poppets can be fully closed to achieve complete flow isolation when maintenance or system shutdown is required.
Actuation Options:
Electric
Slow, controlled modulation for automated operation
Pneumatic
Fast open/close action with position control
Hydraulic
High-force actuation for large or high-cycle systems
Key Features & Advantages
- Precise flow redirection between main and bypass ducts
- Excellent sealing performance at high temperatures
- Compact design compared to large diverter dampers
- Fast and reliable switching between outlet and bypass
- Fully automated operation with position feedback
- Zero-leakage options for critical isolation applications
Why Choose Poppet Damper – Series 1907?
- Proven design for inlet–outlet–bypass flow management
- Engineered for extreme temperature and pressure conditions
- Compact, efficient, and maintenance-friendly construction
- Fully automated control with smart actuation and feedback
- Supported by end-to-end engineering, testing, and service from SUDE
SUDE Poppet Damper Advantage:
At SUDE Engineering Pvt Ltd., our Poppet Dampers are designed for critical high-temperature flow diversion and isolation applications where reliability is paramount.
Using advanced CFD analysis, precision machining, and in-house actuator integration, each damper ensures accurate sealing, fast actuation, and durable operation under demanding service conditions.
Our expertise in thermal load management, pressure balancing, and custom refractory-lined construction allows SUDE to deliver tailor-made solutions for gas turbines, HRSGs, and pollution control systems.
Applications
Gas Turbine Bypass Systems
HRSG Inlet and Outlet Flow Control
Furnace Flue Gas Redirection
Heat Recovery & Thermal Offload Systems
Pollution Control Equipment (ESPs, SCRs, or Bag Filter Bypass)
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