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Flow Control Valve (Plunger Type)
Plunger Type Flow Control Valve provides accurate linear flow regulation and discharge control for large-diameter pipelines. The plunger or axial-flow element modulates flow smoothly, providing controlled discharge with reduced turbulence. Particularly suitable for large-diameter water-flow regulation where controlled throttling is required, available in cast or fabricated body construction.
Introduction
The plunger type flow control valve is a large-diameter throttling valve that uses a plunger or axial-flow element to regulate flow smoothly. It is engineered for water systems where controlled discharge and reduced turbulence are required, particularly in large-diameter pipelines.
Key Features
- Plunger type or axial flow control element.
- Cast or fabricated body construction.
- Stainless Steel, Duplex, or Special Alloy plunger.
- Replaceable metallic or elastomeric seat.
- Variable opening / throttling flow regulation.
- Controlled discharge with reduced turbulence.
- Suitable for large-diameter water-flow regulation up to DN 2000 mm.
- Double flanged / flanged end connections for robust integration.
Technical Specifications
| Design Feature | Standard Parameters / Range Options |
|---|---|
| Nominal Size Range | DN 100 mm to DN 2000 mm |
| Manufacturing Standards | Manufacturer Standard, Hydraulic Institute, IEC 60534 principles where applicable |
| Material of Construction (MOC) |
|
| Pressure Ratings | PN 10 / PN 16 / PN 25 / PN 40 / Class 150# / Class 300# |
| Modes of Operation | Manual, Gear Operated, Pneumatic, Hydraulic, Electric |
| End Connections | Double Flanged / Flanged |
| Application Media | Water Supply / Pumping Stations / Hydro Projects / Irrigation / Pressure & Flow Regulation |
Application & Usage of Flow Control Valve (Plunger Type)
Water Supply & Distribution
Regulates flow in large-diameter transmission and distribution mains, allowing operators to balance supply zones and control discharge.
Pumping Station Discharge Control
Controls pump discharge flow during start-up, shutdown, and normal operation, smoothing the flow and reducing pressure surges.
Hydroelectric Projects
Provides precise flow regulation to turbines and bypass lines, helping to manage head, flow, and plant output.
Irrigation Networks
Regulates canal and pipeline flows to deliver the required quantity of water to command areas while preventing surges.
Pressure Reduction
Serves as a pressure-regulating element in transmission lines, reducing high inlet pressure to a controlled downstream level.
Types of Flow Control Valves
Plunger Type
Features a machined plunger that moves in and out of a seat to modulate flow with a linear characteristic and controlled discharge.
Axial Flow Type
Uses an axial-flow trim to guide the fluid along the axis, minimizing turbulence, noise, and pressure loss at large openings.
Cast / Fabricated Body
Available in cast or fabricated construction to suit large diameters and high-pressure applications with long service life.
Certificates & Inspection
All valves are subjected to rigorous hydrostatic shell and seat pressure testing in accordance with standard codes (e.g., API 598 / IS 14846) prior to delivery.
- Physical dimension and wall-thickness checks
- Hydrostatic seat and shell test validation
- Manufacturer Test Certificate (MTC) and third-party inspection (SGS, TUV, RINA, IRS etc.) available
- Epoxy powder coating inspection (DFT test)
Quality Assurance
GM Dalui & Sons Pvt. Ltd. is an ISO 9001:2015 certified manufacturer. Our commitment to safety, reliable sealing, and long service life is backed by rigorous material inspection, ultrasonic wall thickness checks, and design calculations.
We customize flow control systems to meet specific requirements for municipal waterworks, agricultural pumping wells, chemical distribution loops, and thermal power plant grids.