Stainless Steel Electric Pressure Control Valve

The three-eccentric high-performance seal butterfly valve is a new generation seal butterfly valve independently designed and developed by our company after referring to advanced technologies at home and abroad. According to different seal assemblies at the body, the butterfly valve has three types: The first type is to adopt a multi-level compound seal structure. The seal ring is made of soft and hard layered stainless steel sheet and elastic sealing gasket, making it have the advantages of metal hard seal and elastic seal. The seat sealing face is subject to integral overlaying welding of temperature and corrosion resistant alloy materials. The contact face of the seal ring and seat of the valve adopts a "cone-in-cone" structure, and the two cones are both bevel cones. The contact angle between the seal ring and metal seat produces light "wedge effect", making the seal ring produce flexible movement and radial compression. Thanks to the even contact between the seat and seal ring, the tightest shut-off can be realized by using the lowest torque, featured by high reliability and stability and long sealing face service life. The second type is to adopt a soft seal structure. Its seal structure is similar to that of the multi-level compound seal butterfly valve, with the difference that the seal ring is made of integral PTFE materials, which are more suitable for applications with high on-off frequency and high requirements for sealing face corrosion resistance. The third type is to adopt a metal hard seal structure. The sealing pair does not contain any nonmetals. The seat sealing face and the seal ring sealing face are subject to Stellite overlaying welding, ensuring anti-erosion during the use. The sealing pair adopts a "hard-contact-hard" structure. Once the valve is closed, there is no need to adjust through the closing position, and the sealing is very reliable. The valve is widely applied in such industries as petroleum, chemical industry, light industry, oil terminal, metallurgy, electric power, etc. Feature: 1. Compact structure: low volume, light weight and easy maintenance. 2. Smooth flow channel: low flow resistance, low pressure drop and high flow. 3. Three-eccentric multi-level compound seal butterfly valve: It uses the unique cam effect, so that during the valve's 90-degree travel the seat is totally disengaged from the disc seal ring without any friction. Three-eccentric soft seal butterfly valve: The sealing pair is made of integral PTFE materials, which are suitable for applications with high medium cleanliness, frequent valve on-off and high requirements for sealing pair corrosion resistance. Especially it can ensure that its service life is basically the same as that of the pipe in the thermal system. Three-eccentric metal seal butterfly valve: The sealing pair adopts a full metal seal structure. The sealing pair adopts a "hard-contact-hard" structure as shown in figure 1 pneumatic three-eccentric butterfly valve. The seal has a long service life. It is suitable for service conditions where the medium working temperature is extreme, the erosion is severe and there is the occurrence of "crystallization". 4. Strong anti-wear performance: The disc adopts a three-eccentric structure and the sealing face is subject to hard alloy overlaying welding with good anti-wear performance. 5. Valve flow characteristics: Approximate equal percentage. Control and shut-off can be realized. Body main technical parameters:

body type	two-piece, three-piece
Nominal diameter	DN15~500(NPS1/2~24)
Nominal pressure	PN 1.6~4.0Mpa(Clsaa150~600)
Type of connection	flanged
Material	A216-WCB, A351-CF8, A351-CF8M, A351-CF3, A351-CF3M, A217-WC6, A217-WC9
Bonnet: standard type	-20~250°C
high temperature type	250~525°C
Packing	PTFE, flexible graphite, nickel-based wire reinforced flexible graphite

Trim main technical parameters:

Plug type	O straight-through type
Plug material	A182-F304, A182-F316
Seat material/soft seal:	PTFE, RPTFE, PPL
hard seal	:A182-F304, A182-F316
Flow characteristic	quick opening
Rated Cv value:	See table 4 for details.
Rated travel	0~90°C
Seat Leakage class/soft seal	ANSI B16.104 class VI
Hard seal	ANSI B16.104 class V(hard seal class VI for special orders)
treatment for body	plug.ball.seat.stem etc

Table 1: design and manufacturing standards

Standard	Design and manufacturing	Face-to-face dimensions	Flange dimensions	Pressure and temperature ratings	Inspection and testing	Leakage class
National standards and industry standards	GB/T12224, GB/T12238, JB/T8527	GB/T12221	GB/T9112~9124, HG/T20592~20635, SH3406JB/T79	GB/T9124, GB/T12224	JB/T9092, GB/T13927	GB/T4213
American Standard	API609	API609	ASME B16.5, ASME B16.47	ASME B16.34	API598	ANSI/FCI70-2, ASME B16.104
Other national standards		JIS B2002, ISO5752	EN1092

Table 2: Actuator

Model Item	Cylinder actuator		Electric Actuator
	AT/AW	ATK/AWS	Determined according to ordering requirements
	Double-acting	Single action
Usage	Shut off, Adjust		Shut off, Adjust
Power supply	Air supply: 0.4 ~ 0.7MPa (G)		Power: 220VAC / 50HZ, 380VAC / 50HZ
Connection	NPT1/4-Φ8, NPT3/8-Φ12, NPT1/2-Φ16		Electrical Connection: With electric actuator configuration or user requirements
	24VDC, 220VAC, 4~20mA, 4~20mA+HART		4~20mA
Action type	Shut off: When the solenoid valve is powered on, the valve is on or off. Adjust: The valve is on or off with the increase of positioner input signal.		Shut off: The valve is on or off when powered on. Adjust: with the input signal increases valve opening or valve off
Allowable ambient temperature	-40°C~+80°C		-40°C~+80°C
Accessories	Hand operated mechanism, solenoid valve, electric/pneumatic valve positioner, transponder switch, air filtering pressure relief valve, speed increaser, position holding valve, air control valve, etc.		Hand operated mechanism, transponder switch, input/output switch signal, surge protector, local switch, selector switch, etc.

Molybdenum Scrap

The biological properties of molybdenum are also important, as it is an essential trace element not only for plants but also for animals. Molybdenum is one of the main components of molybdenum flavin protease in nitrogen-fixing bacteria in plants; it is also one of the main components of plant nitrate reductase; it can also stimulate the activity of phosphatase, promote the synthesis and transportation of sugar and starch in crops; it is conducive to early maturity of crops . Molybdenum is one of seven important micronutrients. Molybdenum is also one of the basic components of xanthine oxidase and aldehyde oxidase in the liver and intestine of animals, and also the basic component of heparin sulfite oxidase. Studies have shown that molybdenum has obvious anti-caries effect, and molybdenum has a strong inhibitory effect on the formation of urinary stones. A healthy person weighing 70kg contains 9mg of molybdenum in the body. For humans, molybdenum is the only element known to be essential to humans among the second and third transition elements. Compared with similar transition elements, molybdenum has extremely low toxicity and can even be considered basically non-toxic. Of course, excessive ingestion also accelerates the oxidation of the elastic substance - plasmalogen - in the walls of human arteries. Therefore, in areas with high molybdenum content in the soil, the incidence of cancer is lower, but the incidence of gout and systemic arteriosclerosis is higher. Animals, especially long-horned animals, who eat forages containing excessive molybdenum are prone to stomach problems.

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