Pressure Reducing Valve (PRV)
GM Dalui Pilot-Operated Pressure Reducing Valves maintain a constant pre-determined downstream pressure, regardless of fluctuations in upstream pressure or flow demand. The valve is hydraulically operated, using fluid energy to regulate flow.
Introduction
GM Dalui control valves are precision valves designed to regulate fluid flow, pressure, or temperature automatically based on signals from a controller. They play a crucial role in process industries such as power generation, chemical processing, water treatment, and HVAC systems.
Key Features
- Accurate and stable downstream pressure control under varying conditions.
- Pilot valve system is easily adjustable to set desired output pressure.
- High-grade nylon reinforced EPDM diaphragm for smooth regulation and long life.
- Easy inline maintenance without dismantling the main valve body.
- Includes fine-mesh pilot filter to prevent debris clogging.
Technical Specifications
| Design Feature | Standard Parameters / Range Options |
|---|---|
| Nominal Size Range | Up to 300 mm |
| Manufacturing Standards | BS EN 1567, Manufacturer Standard |
| Material of Construction (MOC) |
|
| Pressure Ratings | 1.0 / 1.6 / 2.0 / 2.5 / Class 150# / 300# / 800# |
| Modes of Operation | Self-Acting Hydraulic (Pilot Operated / Diaphragm) |
| End Connections | Flanged |
| Application Media | Municipal water distribution, tall building water supply, industrial utility networks. |
Application & Usage of Pressure Reducing Valve (PRV)
Municipal Water Distribution
Controls pressure zones across water grids to prevent pipe bursts, leaks, and energy losses.
HVAC System Circuits
Balances pressure in chilled water or heating loops across commercial and industrial high-rises.
Industrial Processing Plants
Ensures critical processing loops receive fluids at steady, safe operating pressures regardless of inlet fluctuations.
Types of Pressure Control Valves
Globe Control Valve
Uses linear plug motion and automated controllers for precise pressure throttling in power and process plants.
Pilot-Operated Diaphragm PRV
Utilizes fluid energy and a sensitive pilot control system to modulate flow, maintaining constant downstream pressure.
Self-Acting Pressure Regulator
Directly controls system pressure via integrated diaphragm/spring mechanisms without external power grids.
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.