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HVI Reliable Safety Relief Valves by Nichiboku Ltd.

Welcome to Nichiboku's industrial Blog

Introduction

In industrial systems where safety and efficiency are critical, pressure control cannot be compromised. HVI Reliable Safety Relief Valves deliver trusted performance in protecting boilers, pipelines, compressors, and liquid process systems. With precision Japanese engineering, these valves ensure reliable overpressure protection across air, gas, steam, and liquid applications.


Silver relief valve on a blue-orange gradient background. Text: "HIRATA VALVE INDUSTRY SAFETY RELIEF VALVES" and "HVI" in bold on the left.
HVI Reliable Safety Relief Valve for industrial gas, steam, and liquid applications, showcasing robust design by Hirata Valve Industry.

Technical Advantages of HVI Reliable Safety Relief Valves

Built for demanding environments, HVI safety relief valves combine robust construction with reliable functionality. Designed for direct-acting, spring-loaded operation, they provide fast actuation, stable reseating, and long service life.

Key Benefits of HVI Safety Relief Valves

  • Multimedia versatility: Suitable for gases, steam, and liquids.

  • Fast and precise response: Quick opening when set pressure is reached; tight shut-off after relief.

  • Flexible configurations: Wide range of materials, seat types, and JIS flanged end connections.

  • Durable build: Precision-machined internals for repeatable performance.

Design & Engineering Excellence

HVI safety relief valves are engineered with stainless-steel internals, corrosion-resistant options, and precision-guided discs to ensure stable lifting and minimal chatter. Available in carbon steel, stainless steel, or cast iron, these valves adapt to a wide variety of plant requirements.

Range & Connections

Parameter

Range / Options*

Nominal size

8A – 250A (varies by valve type)

Body material

Carbon steel / Stainless steel / Cast iron

Media

Air, gases, steam, liquids

Action

Spring-loaded, direct acting

Seat

Metal or soft-seat options (per model)

Ends

Flanged; JIS standards typical (others on request)

*Exact limits (pressure/temperature classes, leakage class, blowdown range, capacity coefficients) depend on the specific model and configuration.

Example of Safety Valve Piping in Process Systems

Understanding the placement of vacuum and pressure safety valves is crucial for ensuring proper system design and operation. Below is a visual example of a typical safety valve piping layout.

Safety valve piping diagram on yellow background. Gray pipes and valves with gauges labeled: Stop Valve, Pressure Reducing Valve, Safety Valve.
Industrial Diagram: Hirata Valve Industry's safety valve piping system highlights effective steam control and safety measures. The layout features stop valves, a pressure-reducing valve with dual gauges, and a safety valve for overpressure protection, alongside an auxiliary bypass line.

Typical Applications

  • Boilers and steam systems

  • Air and gas receivers

  • Compressors and pumps

  • Heat exchangers and storage tanks

  • General process pipelines

Optimize Your Safety System

When specifying an HVI relief valve, important parameters include set pressure, required relieving capacity, medium type, body and trim material, and installation orientation. Nichiboku Ltd. provides expert support to help you select the ideal valve configuration for your plant’s safety requirements.


Contact Nichiboku Technical Support

Connect with Nichiboku's expert support team to explore tailored safety valve solutions for your application.📩 Nichiboku Ltd. – www.nichiboku.com📞 Contact us to request specifications or schedule a consultation with our technical team



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