Control Butterfly Valves

Control butterfly valves of Weidouli are designed and manufactured in strict accordance with the latest version of API 609 specification, meanwhile, our company can also meet BS5155, ANSI B 16.34, ASME SEC VIII, and other major specifications, which ensures that our control butterfly valve can fit in all industrial fields.

A control butterfly valve is a valve that can be used for isolating or regulating flow. It is called a quarter-turn valve too. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut-off. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Control butterfly valveswith double offset design and triple offset design. Control butterfly valves are generally favored because they are lower in cost than other valve designs as well as being lighter in weight.

The Features of Control butterfly valves

Double safe construction

According to the specifications of API609, two independent thrust collars are installed at the lower side of the disc to prevent disc deformation, valve stem dislocation and sealing surface occlusion caused by fluid pressure and temperature, thus ensuring the normal operation of the valve in any working conditions; Meanwhile an independent valve stem ejection mechanism is designed at the lower end of the valve to prevent unexpected accidents caused by valve stem breakage or ejection.

No dead band

In the design process, we consider the regulation and control application, so we make the most of the sealing principle of triple offset butterfly valve to achieve that the disc does not scratch the seat and the torque of the stem is transmitted directly to the sealing surface through the disc when the valve is switched on and off, that is to say, there is almost no friction between the disc and the valve seat, thus eliminating the jump phenomenon and the inability of regulation caused by various unstable factors such as friction in the low opening range of valve, which means the dead band is eradicated. This means that our butterfly valve can enter the adjustable region from zero to 90 degrees, and its normal control ratio is more than twice that of the general butterfly valve, and the highest control ratio can be as high as 100:1.

The laminated seat of a triple offset butterfly valve

The valve seat is made of metal sheet and graphite sheet, which can effectively prevent the influence of small solids in the medium and the sealing surface occlusion caused by thermal expansion, ensuring that it has no leakage even if there exists minor failure.

The replaceable seat of a double offset butterfly valve

Our butterfly valve sealing pair is unique. The valve body seat can be replaced, and since the disc sealing surface and the disc are independent, the disc sealing surface can also be replaced, which means it is no longer necessary to transport the damaged disc to the manufacturer or decompose the valve, just needs to replace the sealing surface of the butterfly plate. This not only greatly reduces the maintenance cost, but also greatly reduces the maintenance time as well as maintenance intensity and difficulty.

Fire-safe structure

Our triple offset butterfly valves are fire-safe design and have obtained the certificates of API607 and API6FA, which ensures that our triple offset butterfly valve can be used in various dangerous areas such as petroleum, petrochemical, and so on.

Super seal packing

Traditionally, the leakage of valve seats (Internal leakage) has been the focus, while the leakage of packing parts (External leakage) has been neglected. In fact, now it is indisputable that external leakage is far more harmful than internal leakage. A triple offset butterfly valve is a rotation valve, whose stem only makes 90-degree rotation. Compared with spiral multi-rotation of valve stem in gate valve and globe valve, its wear degree of packing part is lower and its service life is longer. In terms of external leakage, we have adopted the highest standard design, which can guarantee the standard sealing performance below 100 ppm when conducting external leakage tests in accordance with EPA21 specification.

Hawking Metal Surface Processing Technology

The surface roughness of the elements processed by the Hawking Machine is less than Ra0.2, which improves its surface hardness and wear resistance, reduces the wear of sealing filler and the valve torque, and makes the seal of the dynamic sealing part more reliable.

Spring-loaded to compensate seal automatically

The belleville spring is used to load the connecting bolt of gland flange to prevent an abnormal change of pressure and temperature in the pipeline. The belleville spring can automatically compensate for and protective sealing.

Weidouli ValvesCo., Ltd., is a professional butterfly valve company, we provide valve for sale, Gate Valves, control valve china, china industrial valve, etc. Contact us to know more.

There are many wireless butterfly check valve manufacturersbut we are one of the best choices for you, Weidouli Valves Co., Ltd., founded in 1989, specializes in the production of high alloy valves. For more information, please feel free to contact us!

Другие товары поставщика

	Monel Check Valves	Weidouli offers a comprehensive range of Monel check valve for all types of applications and industries. Dual plate check valves have ASME JB/T 89...
	Titanium Butterfly Valves	Weidouli titanium butterfly valvescan be available in casting or forging type. Recently Weidouli supplied lots forging titanium butterfly valves fo...
	Duplex Globe Valves	The microstructure of the duplex stainless steel globe valve consists of a mixture of an austenitic phase and a ferrite phase. Therefore, the duple...
	Duplex Ball Valves	Duplex ball valvehave the advantages of both ferritic stainless steel and austenitic stainless steel: austenitic stainless steel reduces the brittl...
	Inconel Plug Valves	Inconel: More than twenty different grades are hiding behind this name. These materials are highly resistant to corrosion and creep and their ducti...

Все товары поставщика

Похожие товары

	"High-reliability Support ring Y10-4 for power station	Продавец: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD	"High-reliability Support ring Y10-4 for power station Deyang YOYIK have power plant professional...
	"Wear Resistance dn50 globe valve WJ25-F1.6P for thermal power plant	Продавец: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD	"Wear Resistance dn50 globe valve WJ25-F1.6P for thermal power plant YOYIK professional productio...
	High-efficiency Superheater outlet plug valve SD61H-P61305V SA-182 F92 for power generation	Продавец: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD	"High-efficiency Superheater outlet plug valve SD61H-P61305V SA-182 F92 for power generation Deya...
	Automated Sealing gasket for corrugated pipe shut-off valve KHWJ25F3.2P for power station	Продавец: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD	"Automated Sealing gasket for corrugated pipe shut-off valve KHWJ25F3.2P for power station Is a m...
	Class 1500 LB gate valve	Продавец: China LiCB AC DC EV Charger Co., Ltd	Product Name: Low-EmissionPacking Setfor Class 1500 LB API 6D Gate ValveModel: M600Size: ID 68 mm...