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Hydraulic Control Valve

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Product Overview

In the intricate networks of modern water and fluid systems—from municipal water distribution and fire protection to irrigation and industrial processes—precise control is non-negotiable. SHIELD's hydraulic control valves provide the intelligent, reliable, and energy-autonomous solution. As fully automatic control valves powered solely by line pressure, they eliminate the need for external power, offering unparalleled reliability in pressure reducing, flow control, and system protection. This guide explores their innovative design and the extensive range of pilot operated control valves available for every application.

Shield™ Hydraulic Control Valve

Pressure Management Flow Control Level Control Safety Systems

Product Categories

The SHIELD 800 Series is a modular platform. A single, rugged basic valve body can be configured with various pilots to create over twenty specialized valves. Here is a detailed classification:

Pressure Management & Regulation

These valves maintain critical set points, prevent pipe damage, and ensure system efficiency.

Pressure Reducing Valve (PR)
Reduces variable high inlet pressure to constant lower outlet pressure
PR
Pressure Sustaining Valve (PS)
Maintains minimum upstream pressure by modulating open
PS
Proportional Pressure Reducing Valve (PRD)
Reduces pressure by a fixed ratio
PRD
Combination Valves (PRPS, FRPR)
Combines multiple functions in one unit
PRPS/FRPR

Flow Control & Pump Protection

Designed to manage pumps and regulate flow rates smoothly to prevent destructive water hammer.

Flow Control Valve (FR)
Limits flow to a preset maximum
FR
Pump Control Valve (PC)
Ensures soft start/stop sequences
PC
Deep Well Pump Control Valve (DPC)
Protects submersible systems from pressure shocks
DPC
Check Valves (HCV, NSC)
Prevents backflow with zero-surge closure
HCV/NSC

Level, Altitude & Safety Systems

Automate reservoir management and protect infrastructure from abnormal events.

Float Level Control Valve (FL)
Provides modulating tank control
FL
Altitude Control Valve (ALT)
Uses pressure-sensing pilot for precise reservoir level control
ALT
Surge Anticipation Valve (SA)
Opens rapidly to absorb energy from pump trips
SA
Quick Pressure Relief Valve (QR)
Vents excess pressure
QR

Body Types

Our hydraulic control valves has 2 types:

Z Type Body

Y Type Body

Hydraulic Valve Models

Our hydraulic control valve portfolio is designed to meet the diverse requirements of modern industrial systems, ensuring reliable valve automation in various operating conditions.

Double Chamber

Diaphragm Actuated, Disc Closed Type

Single Chambe

Piston Actuated, Disc Closed Type

Pressure Management & Regulation Valves

Pressure Reducing Valve (PR)

A cornerstone water pressure control valve, it reduces a variable, high inlet pressure to a constant, lower outlet pressure. It is a precise water pressure regulator valve that closes drip tight at no flow.

Maintains constant downstream pressure regardless of upstream pressure variations
Eliminates the need for complex control systems
Protects downstream equipment from excessive pressure
Ideal for municipal water distribution systems

Pressure Sustaining Valve (PS)

This valve maintains a minimum upstream pressure by modulating open, ideal for pump bypass lines and ensuring adequate pressure in critical system areas.

Prevents pressure from dropping below a set minimum
Ensures adequate pressure for fire protection systems
Modulates smoothly to maintain precise pressure control
Reduces pump cycling and energy consumption

Proportional Pressure Reducing Valve (PRD)

Reduces pressure by a fixed ratio, simplifying control logic in specific systems where proportional pressure reduction is required.

Maintains a constant pressure ratio between inlet and outlet
Simplifies system design with predictable pressure relationships
Ideal for applications with varying flow rates
Reduces complexity in multi-zone pressure control systems

Flow Control & Pump Protection Valves

Flow Control Valve (FR)

This modulating control valve limits flow to a preset maximum, unaffected by pressure changes, perfect for irrigation control valve applications and industrial processes requiring precise flow regulation.

Maintains constant flow regardless of pressure variations
Prevents over-consumption in irrigation systems
Ensures consistent process flow in industrial applications
Reduces water hammer by controlling flow acceleration

Pump Control Valves (PC, DPC)

The booster pump control valve ensures soft start/stop sequences, while the deep well pump control valve protects submersible systems from pressure shocks and water hammer.

Eliminates damaging pressure surges during pump start/stop
Extends pump life by reducing mechanical stress
Prevents column separation in deep well applications
Reduces maintenance costs and system downtim

Level, Altitude & Safety System Valves

Level & Altitude Control Valves (FL, ALT)

The float level control valve provides modulating tank control, while the altitude control valve uses a pressure-sensing pilot for precise reservoir level control in water towers and storage tanks.

Automates filling and emptying of storage tanks
Prevents overflow and ensures minimum water levels
Eliminates the need for complex electronic controls
Reliable operation in remote locations without power

System Safety Valves (SA, QR, FE)

The surge anticipation valve is a critical surge anticipating valve that opens rapidly to absorb energy from pump trips. The quick pressure relief valve vents excess pressure, and the excessive flow shut-off valve acts as a safeguard against line breaks.

Protects pipelines from damaging pressure surges
Prevents catastrophic failure during power outages
Automatically responds to abnormal system conditions
Reduces insurance costs by minimizing risk of system failure

Technical Superiority for Demanding Applications

Beyond versatility, SHIELD valves are built to last in building services and HVAC control valve applications. Key features include:

Cavitation & Damage Control

The Y-type design and optional A-port disc minimize turbulence, placing the valve firmly in the safety zone of the cavitation chart and extending service life.

Robust Construction

Made from ductile iron and stainless steel with electrostatic epoxy coating, they withstand harsh environments and corrosive conditions.

Flexible Actuation

Configurable for single or double chamber operation and compatible with electrically operated control valve setups using solenoid pilot valves for automation.

Energy-Autonomous Operation

Powered solely by line pressure, eliminating the need for external power sources and ensuring reliability in remote or critical applications.

Modular Design

A single valve body can be configured with various pilots to create over twenty specialized valve types, offering cost-effective customization.

Why SHIELD is the Preferred Choice

As a leading hydraulic valve supplier and control valve manufacturer, SHIELD combines decades of engineering expertise with global manufacturing. Our valves are designed to international standards, ensuring drop-tight closure, long life, and minimal maintenance. Whether you need a simple pressure reducing valve or a complex differential pressure control valve, our modular system provides a cost-effective, reliable solution backed by expert support.

Ready to specify the right valve for your system? Contact our engineering team today for control valve sizing guidance, detailed pressure reducing valve specifications, and a comprehensive quote. Explore our full product catalog to find the perfect automatic hydraulic control valve solution for your application.

Technical Drawings & Resources

Download detailed technical drawings, product brochures, and specifications for our valves. These resources provide comprehensive information for engineers, procurement specialists, and maintenance teams.

?Technical Drawings

Complete set of detailed engineering drawings in PDF format for easy integration into your design projects. Includes dimensional drawings, assembly diagrams, and installation guidelines.

Please download the GA drawings of SHIELD Hydraulic Control Valve on "resources center" page.

Find Technical Drawings of SHIELD Hydraulic Control Valve

Product Documentation

Certificates

Apr.22.2026 21

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