Instrument Non-Bonnet Valves – Gate Valve by Shoritsu Seisakusho

Luis Alberto Fing
Oct 18
2 min read

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Precision Forged Japanese Engineering for High-Pressure Applications

Shoritsu Seisakusho, a leading Japanese manufacturer renowned for its forged steel valve technology, delivers uncompromising quality and reliability with the Instrument Non-Bonnet Valves – Gate Valve by Shoritsu Seisakusho. Designed under stringent ISO9001-certified processes, these precision valves exemplify the superior craftsmanship and engineering excellence that Japan is known for.

Image of a metal gate valve on a dark background. Text: Instrument Non-Bonnet Valves. Details include type, style, class, size, materials. — Introducing the Instrument Non-Bonnet Gate Valve by Shoritsu Seisakusho, engineered for unmatched durability and leak-tight performance in high-pressure industrial settings. Constructed from robust materials like carbon and stainless steel, it offers versatile operation with manual, electric, or air cylinder mechanisms. Ideal for various applications.

Exceptional Durability and Leak-Tight Performance

The Instrument Non-Bonnet Valves – Gate Valve by Shoritsu Seisakusho features a robust forged steel body, ensuring superior resistance to high pressure and temperature variations. By eliminating the bonnet structure, Shoritsu’s design minimizes potential leak points and simplifies maintenance, making it ideal for demanding instrumentation systems in energy, petrochemical, and gas processing industries.

Product Specifications

Category	Details
Type	Gate Valve, Globe Valve, Check Valve, and Needle Valve
Style	BB, WB, NB, PSB, etc.
Class	150–4500
Size	1/4 inch – 2 inch
Materials	Carbon Steel, Stainless Steel, Low Alloy Steel, etc.
Operating	Manual Handwheel, Electric Motor, Air Cylinder, etc.

Trusted Across Global Industries: Instrument Non-Bonnet Valves – Gate Valve by Shoritsu Seisakusho

The Instrument Non-Bonnet Valves – Gate Valve by Shoritsu Seisakusho has been widely adopted across industrial facilities where reliability and safety are paramount. From refineries and power generation plants to chemical manufacturing and gas transmission, these valves operate under strict standards such as API STD 602 and JPI-7S-57, ensuring compatibility and compliance with international engineering requirements.

Advantages for Engineering and Procurement Teams

Lower total cost of ownership through reduced downtime.
Extended operational reliability in high-pressure environments.
Proven performance backed by Japanese forging excellence. Reference Drawings : ( pdf ) Catalog: (details)

Valve User Guides

There are complete sets for various valve types of ” VALVE USER GUIDE”.

Kinds of Valve User Guide	Code
BB-OS&Y TYPE	E199801
PRESSURE SEAL BONNET TYPE	E199802
NON-BONNET TYPE	E199803
LONG BONNET TYPE FOR LOW TEMPERATURE SERVICE (LNG)	E199804

Office scene with workers on computers. Focus on a screen displaying "Shoritsu Seisakusho Valve Model Code Generator" app. Bright setting. — Boost engineering efficiency with the Shoritsu Seisakusho Valve Model Code Generator App by Nichiboku Ltd., transforming complex valve configurations into precise model codes effortlessly.

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