R400 High-Frequency Ball Valve
R400 High-Frequency Ball Valve is a shutoff ball valve developed specifically for the product discharge system (PDS) in PP/PE production plants. Designed, manufactured, and inspected in accordance with internationally recognized standards including ASME 16.34 and API 6D, the valve features a distinctive structure and alloy formulation that delivers high sealing integrity, rapid actuation, strong wear resistance, high overall reliability, and extended service life.
Technical data
| Nominal Pressure | Class150~Class600；PN16~PN110 | Nominal Diameter | DN15~DN400；1/2”~16” |
| Operating Temperature | -60℃~+175℃ | End Connection | Flanged and other configurations |
| Leakage Rating | Class VI, API 598 |
Features & Benefits
Exceptional Wear Resistance for Long-Term Service Life
The valve is rated for over one million on-off cycles, with a specialized surface hardening process enabling the ball and seat sealing surfaces to deliver outstanding resistance to wear and erosion.
Low Operating Torque and Fast Response
The sealing pair features a low coefficient of relative friction. Complemented by all-metal wear-resistant bearings and an oversized hardened stem, this design effectively reduces the operating torque. The fast actuation speed matches the precise process timing requirements of high-frequency sequential logic control.
Bubble-Tight Shutoff with Reliable Sealing
Compliant with API 598 leakage class requirements, the bidirectional DBB seat design achieves ANSI Class VI sealing (bi-directional bubble-tight shutoff). The seat is constructed from a purpose-developed wear-resistant alloy and integrates a scraper self-cleaning mechanism, effectively preventing particle deposition and hard scale buildup that could scratch the sealing surface. This maintains high sealing integrity after extended high-frequency operation.
Enhanced Safety with Multi-Layer Protection Design
Incorporates five key safety features: rapid on-off operation, automatic cavity pressure relief, anti-blowout stem, fire-safe construction, and antistatic design. The self-relieving cavity structure prevents abnormal pressure buildup in the valve cavity that could otherwise damage the valve body. The anti-blowout design prevents the stem from being ejected under high pressure. The metallic fire-resistant materials are inherently fire-safe. The antistatic design dissipates static electricity to reduce the risk of ignition in the presence of flammable media.
Low Fugitive Emission Design for Environmental Compliance
The valve employs a live-loaded packing structure that automatically compensates for packing wear caused by extended high-frequency operation. It maintains consistent stem sealing force and effectively reduces external leakage at the packing and bonnet joint areas, supporting compliance with increasingly stringent environmental emission standards.
Certifications
Applications
Chemical
A purpose-developed shutoff ball valve for polypropylene (PP), high-density polyethylene (HDPE), and linear low-density polyethylene (LLDPE)/full-density polyethylene units in petrochemical applications.
Case Studies
PetroChina Sichuan Petrochemical Co., Ltd.
The first valve was commissioned at the PP unit in 2017. It has been in continuous service, demonstrating stable field performance and reliable operation.
PetroChina Dushanzi Petrochemical Branch
Domestically manufactured high-frequency ball valves have been successfully commissioned at the 300,000 t/a HDPE unit, demonstrating stable field performance under demanding conditions.
