Zhejiang Taiyi Valve CO.,LTD.

At Taiyi Valves, we’re constantly striving to develop new and innovative solutions for severe service ball valve applications.

Severe service ball valve applications are as varied as the process industries that we service. Stress to ball valves does not always result from the traditional culprits of “ high velocity slurry flows “ or “ high cycle frequency with aggressively abrasive fluids “.

The elevated temperature dictated metal seat construction and isolation of the two process fluids during both the off phase and the operating “a” flow or “b” flow meant class VI shut off simultaneously on both seats.

Our answer was Garmet-38 seats lap matched to a hard faced 316 stainless ball at a 1 micron finish. The seats were independently live loaded against the ball using Inconel springs and all the seals were graphoil for temperature tolerance.

Containment bolting used Belleville spring washers to maintain compression loads during thermal cycling and to compensate for the effects of the differential temperatures of the dissimilar process fluids.

Our proprietary approach to seat geometry, seat loading and the lubricating qualities of Garmet-38 resulted in valves with low operating torques, smooth operation and class VI shutoff performance at both inlet ports.

Think of us when the combination of design parameters and process need requires imaginative solutions that perform reliably.

The valves are divided into different types according to their specifications and to achieve specific functions. Now, a deep look at the valve is made here.

As in other valves, a Ball Valves is normally used to control the flow. The party fielded a ball valve is a spherical disc, which controls the flow through them. And there is a hole or port in the center of the sphere. Indeed, while both the long end of the valve. If there are two ends of the flow valve on the line. And when the valve is closed, the hole is blocked perpendicular to the ends of the valve and flow. During this process, the handle or lever of great benefit in line with the position that the port is to be done.

Based on specific requirements and ease of use of ball valve in the industry largely due to the versatility and range of pressures and temperatures of support. Sizes and in general from 0.5 cm to 30 cm. In general, materials for the body of ball valves, metal, plastic or metal with a ceramic center. The ball and often cover for increased durability and valve malfunction in case of chrome power.

In order to meet specific requirements of industry, ball valves are classified into different types. From the standpoint of body shapes, only done in three parts, with accommodation in two parts, the first entry, and soldiers. I must say that the classification is based on the number of valve parts. Although there are several types of valves, the operation is similar. And from the standpoint of the mechanism of the ball was, there are many styles. Are reduced to the entire port, scion of the ball valve V-port and the valve cavity filling. Moreover, manual valves closed quickly. And some are ball valves with pneumatic actuator that can be operated or equipped. These valves are usually equipped with a positioner. In this way, becomes for them according to the control signal to the actuator position and valve opening easy. For example, ball valves are usually multi-port 4-way or more. They are available in the market. And by the way of air motors from forward to reverse, turning the operating leverage of a single 4-way valve is made. What else, one piece ball valves are almost always associated with reduced shipping costs, which are relatively inexpensive and often disposable. And two piece ball valves are usually easily reduced (or standard) was wearing, it can be disposable or repaired.

only in words, some general ideas on the head of the ball valve, I guess. We hope that ball valves be used to improve the industry and our daily lives.

The Alloy Valves and Control (AVCO) 1500 series cryogenic ball valve is designed and engineered to handle extreme low temperatures for cryogenic fluids such as liquid oxygen, nitrogen and hydrogen to -320oF (-196oC). Gas Separation plants, Food Processing, Aerospace and Petrochemical plants are just a few industries where this unique valve is used. The AVCO Cryo valve is versatile in design and able to isolate, control and divert liquid and gaseous media for terminal, storage, transportation or process piping facilities.

The AVCO Cryogenic ball valve is superior in design due to the dual stem seal, extended bonnet in a bolt-on construction. The extension varies in size from 6” (150mm) to any customer specified length and the stem shaft consists of a live-loaded stem assembly with packing at the base of the bonnet and the top where the handle is located. It is the “dual stem seal” technology for cryogenic service which separates us from our competitors. The 316SS stem shaft has an Anti-Static (grounded) feature to overcome any electrical charge of non-grounded equipment and maintain stem contact with the valve body at all times due to it being spring loaded. The valve also comes in fire safe design with graphite sealing material to conform to API 607. The bonnet has an ISO 5211 mount pad for easier automation by way of manual, pneumatic or electric actuation for on/off and modulating applications.

The 1500 series has a three (3) piece valve body which allows maintenance to be performed on the seats, seals and ball whilst the end caps are in-line. The ball is unidirectional due to vented relief on the upstream side of flow to eliminate pressure build up in the ball cavity due to thermal expansion. Anti-vibration washers are provided on the body bolts of the valve to control expansion and contraction motion due to temperature variations and thereby maintain bolt tightness, thus preventing potential leakage. The valve body construction is made of cast 316 stainless steel (CF8M) and we offer pressure ranges of ASME class 150 through 600 with any end connection design for standard or specialty type request, for example, tube connection are offered. Typically the valve is offered with butt weld, socket weld, NPT, BSP and flush bottom tank pad end styles.

The AVCO 1500 series adheres to the industry standards of ASME B16.34, API 598 and API 607 4th edition, thus leading to high quality products of which the cryogenic market demands. Due to the increasing demand of Liquid Natural Gas (LNG) nationally and globally and the increase in Ultra High Purity cryo systems for the semiconductor market, our cryogenic ball valves are available to ship in less than a week due to AVCO’s abundant stock in California. Industrial gas producers such as Linde (BOC), Air Products and Chemicals and Praxair are just some of the companies who have inquired or purchased from AVCO.

Upon request, AVCO offers “Oxygen cleaning” to clean and degrease valve components and eliminate potential residue that may cause contamination in piping circuits. The cleaning removes oil, grease, paint, particulates, inorganic or organic contaminates. Furthermore, to maintain cleanliness of the valve or valve components, it is individually bagged, tagged and documented to ensure traceability.

　　User requirements can be twisted roots of various electric actuator equipped to realize remote control and automatic control. Sensitive, reliable, easy installation and so on. Can be widely used in tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power ships, metallurgy, energy systems, fluid lines and the closure as a conditioning device. RVEX electric resilient seated gate valve, electric resilient seated gate valve, resilient seated gate valves.

　　1. European rubber vulcanization technology to ensure the skills of rubber elasticity

　　2. Three Ο-ring can significantly reduce water leakage, and in the case of the pressure and constant water replacement “O” ring

　　3. Double tooth type stem, can reduce generation of operating torque

　　4. Embedded copper nut, not easy to loose and damaged

　　5. Inside and outside with rubber laminating pressure designed to avoid loss due to prolonged use without the valve at the bottom of the groove, not easy to siltation caused by debris

　　6. Thrust bearings to reduce friction to reduce operating torque

　　7. Valve in vivo using non-toxic powder epoxy resin coating to enhance corrosion resistance capabilities, improve water quality