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GD-21R Pressure Valve by Yoshitake – Precision Differential Pressure Control
- Luis Alberto Fing
- Feb 16
- 2 min read
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Introduction
In closed-loop fluid systems, maintaining stable differential pressure is essential for operational safety and performance consistency. The GD-21R Primary Pressure Regulating Valve by Yoshitake is engineered to deliver accurate pressure regulation for cold and hot water applications across industrial facilities.
Designed with Japanese engineering precision, this valve ensures reliable pump protection and system stability, making it an ideal solution for engineers and procurement professionals seeking dependable pressure control equipment.
GD-21R Pressure Valve – Engineered for Stable System Performance
The GD-21R Pressure Valve is specifically designed for differential pressure regulation in liquid systems. It is particularly suitable as a relief valve for pumps operating within closed circuits.
Key Features
Suitable as a pump relief valve in closed systems
Single-seat valve structure for tight shut-off performance
Minimal leakage when closed
Diaphragm-operated mechanism for stable pressure response
Designed for cold and hot water applications
This design ensures controlled pressure management while maintaining system efficiency and equipment longevity.
Technical Specifications of GD-21R Pressure Valve
Parameter | Specification |
Application | Cold and hot water systems |
Regulating Differential Pressure (15A–80A) | 0.05–0.25 MPa / 0.26–0.7 MPa |
Regulating Differential Pressure (100A–150A) | 0.05–0.25 MPa / 0.26–0.5 MPa |
Fluid Temperature | 5–80°C |
Body Material | Ductile cast iron |
Valve Seat Material | Stainless steel or bronze |
Valve Disc Material | NBR |
Diaphragm Material | NBR |
Connection | JIS 10K FF flanged |
Surface Treatment (15A–100A) | Electrodeposition coating |
Surface Treatment (125A–150A) | Tar-based coating (black) or electrodeposition coating |
The diaphragm-based structure ensures accurate sensing and stable differential pressure control across a wide operating range.
Nominal Size Selection and Flow Performance
The GD-21R series provides nominal sizes ranging from 15A to 150A, supporting diverse flow capacity requirements. Detailed selection charts allow engineers to determine appropriate sizing based on:
Differential pressure (ΔP)
Specific gravity
Flow rate (m³/h)
Inlet and outlet pressure conditions
This ensures optimized system integration without oversizing or undersizing, improving both energy efficiency and system reliability.
Industrial Applications
The GD-21R Pressure Valve is suitable for:
HVAC systems
Industrial water circulation systems
Pump protection circuits
Closed-loop thermal systems
Process water management
Its robust construction and precise regulation capabilities make it a reliable component in demanding industrial environments.
Why Choose Yoshitake Pressure Control Solutions?
Yoshitake is recognized globally for manufacturing high-quality industrial valves designed for durability and precision. The GD-21R Pressure Valve reflects:
Advanced Japanese valve engineering
Long service life
Stable performance under fluctuating pressure conditions
Reliable sealing performance
For engineers and plant operators, consistency and safety are critical — and this model is designed to deliver both.
Official Documentation
For complete technical reference, please consult the following documentation:
Official Catalog: Access the official product catalog for full specifications, material details, pressure ranges, and application guidance.
Official Drawing: Review the official dimensional drawing for installation planning, piping layout design, and integration into existing systems.
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