API608 American Standard Hard-Sealed Fixed Ball Valve Q347Y

Product Parameters

Nominal Diameter	1/2″~8″ (DN15~DN200)
Pressure Rating	CLASS 150~CLASS 600 (PN16~PN100)
Temperature Range	-29°C~400°C
Connection Type	Butt Weld, Flanged
Body Material	Carbon Steel, Alloy Steel, Stainless Steel: WCB, CF8, CF3, CF8M, CF3M
Internal Parts Material	F6a, F304, F316, etc.
Sealing Surface Material	Nitriding, Nickel-based Alloy, Tungsten Carbide, Tungsten Carbide + Nickel-based Alloy, Chromium Carbide, etc.
Operation Mode	Handwheel, Worm Gear, Electric, Pneumatic, etc.

Technical Specifications

API608 American Standard Hard Seal Fixed Ball Valve Q347Y
Design Standards	GB/T 12237, GB/T 19672, API608, API 6D, BS EN, ISO 17292, BS 5351
Face-to-Face Dimensions	GB/T 12221, ASME B16.10, API6D
Flange Connection	GB/T 9124.1, HG/T 20592, ASME B16.5
Butt Weld Connection	GB/T 12224, ASME B16.25
Material Requirements	NACE MR-0103, NACE MR-0175
Pressure Testing and Inspection	GB/T 26480, GB/T 26481, API 598, ISO 15848-2
Fireproof Structural Design Requirements	GB/T 26479, API 607

Valve Structure and Part Names

Parameter Information

01. Hex Head Bolt 02. Gasket 03. Handle 04. Hex Socket Screw 05. Limit Block 06. Packing Gland 07. Hex Head Bolt 08. Packing Sleeve 09. Packing Assembly 10. Plain Bearing 11. Stem 12. Body 13. Seal Ring 14. Pressure Ring 15. Disc Spring 16. Seat 17. Dust Ring 18. Ball 19. Spiral Wound Gasket 20. Bonnet 21. Stud 22. Nut

Product Features

▶ Handle to Prevent Misoperation

⊙ Equipped with a 90° switch positioning plate with a lock hole, which can be locked as needed to prevent misoperation. The handle part installed on the stem head is designed flat; when the valve is open, the handle is parallel to the pipeline, and when closed, the handle is perpendicular to the pipeline, ensuring correct valve open/close indication.

▶ Fireproof Structure

⊙ The valve sealing surface uses a metal sealing structure, packing uses flexible graphite, and the gasket is made of stainless steel + flexible graphite. Therefore, the valve can ensure reliable sealing even in fire conditions.

▶ Anti-Static Structure

⊙ The metal parts of the high-performance metal hard-seal ball valve, such as the body, seat, and ball, are in close contact, naturally forming an electrostatic conduction path. Therefore, no special anti-static device is required for the metal hard-seal ball valve.

▶ Stem Blowout Prevention Structure

⊙ The stem adopts a blowout-proof design, ensuring that even under abnormal cavity pressure or packing gland failure, the stem will not be blown out by the medium. The stem uses a lower-mounted design with reverse sealing; the sealing force increases with medium pressure, ensuring reliable sealing under various pressures.

▶ Middle Flange Quantitative Compression Design

▶ High-Performance Metal Hard-Seal Ball Valve Seat Sealing Structure

⊙ The high-performance metal hard-seal floating ball valve uses a ball-back seat sealing structure. Generally, it adopts one-way sealing with flow direction marked on the body. If the user has special requirements, a bi-directional sealing structure can be used.

⊙ The seat has a dust-proof structure. Compared to ordinary ball valve seat structures, this seat structure is optimized for special conditions in polysilicon production. It uses an integral seat with the spring hidden inside, ensuring the original seat function while effectively preventing powder (slag) from entering the spring chamber from the valve cavity and flow path, avoiding spring failure.

▶ Seat Scraper Structure

⊙ Self-cleaning double scraper design: scrapers are designed on both inner and outer sides of the seat sealing surface. When the valve operates, it automatically cleans the ball surface to ensure sealing reliability and extend valve service life.

▶ Prevent Valve Seizure at High Temperatures

▶ Uses Advanced Ball and Seat Hardening Technology

⊙ Under high temperature conditions, thermal expansion can easily cause the ball and valve seat to seize, resulting in the valve being unable to open. The high-performance metal hard-sealed ball valve uses a sealing structure loaded with a plate spring or spring. The thermal expansion of components at high temperatures can be absorbed by the plate spring or spring, thus ensuring that the valve will not seize at high temperatures and can operate flexibly.

Dimensional Data

API608 American Standard Hard Seal Fixed Ball Valve Q347Y

High-performance metal hard-sealed floating ball valve. This product uses a special surface hardening treatment, completely solving the problem of frequent wear and replacement of metal hard-sealed ball valves under harsh conditions.

The metal hard-sealed floating ball valve developed by Yuanda features low fluid resistance, smooth flow channels, rapid opening and closing, and ease of automation control, gaining increasingly widespread application.