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Zhejiang AIV Fluid Technology Co.,Ltd. updated with new CE certificate

Zhejiang AIV Fluid Technology Co.,Ltd. updated with new CE certificate, according to the Pressure Equipment Directive 2014/68/EU Annex III, Module H.
After site visit and document reviewed by TUV officer, find out Newton is in standard management process, produce process and research process. TUV certification is a Technical
Inspection Association for the Europe valve market. It has special department for the valve and other pressure equipment. TUV originated from Steam Boiler Monitoring Association of Germany in 1872 and is the symbol of safety, reliability, and quality.
The Directive 2014 / 68 / EU Annex III Module H is highest level of the CE certificate.The scope of certification of Zhejiang AIV Fluid Technology Co.,Ltd including the products are
gate valves(Max.PN100,DN600),
ball valves(Max.PN100,DN500),
globe valves(Max.PN100,DN500),
check valves(Max.PN100,DN600),
The certificate NO. Is DGR-0036-QS-1346-20, valid until October 27th, 2023.
The main products of the Zhejiang AIV Fluid Technology Co., Ltd. contains bellow sealed valves, gate valve, globe valve, check valve, steam trap, strainers, safety valve, pressure reducing valve, steam separator and other valves for steam system, thermal oil system and general industry system. The main material covers A105, WCB, Stainless steel etc. The nominal diameter is from 1/2” to 24” (15mm~600mm) .The nominal pressure is from PN16-PN40(150lb~2500lb). Working temperature is between -196℃~600℃.

Zhejiang AIV Fluid Technology Co.,Ltd. in HEATEC

Zhejiang AIV Fluid Technology Co.,Ltd. will participate the HEATEC, from 3rd to 5th December in the Shanghai International Expo Center. AIV is good supplier for your boiler system. We will show bellow sealed valves, gate valve, globe valve, check valve, steam trap, strainers, safety valve, pressure reducing valve, steam separator and other valves. Welcome to visit our stand .

AIV show in 16th CNPV

The 16th CNPV was held at the Chenggong International Convention and Exhibition Center in Fujian, China, on June 13-15. CNPV was founded in Nan'an, China. Relying on its booming water heating pump and valve resources, after more than ten years of testing and baptism, it has become the most influential and authoritative international professional exhibition of its kind in China. With the theme of "New Silk Road, new integration and new business opportunities", focusing on the new trends of development such as "innovative exhibition" and "online exhibition and sales platform", the fair will fully display the fruitful achievements of the development of Nan'an water heating pump valve and fire fighting equipment industry to the representatives of domestic and foreign water heating pump valve industry through the full combination of exhibition, exhibition and sales.
Zhejiang AIV Fluid Technology Co., Ltd. bring high-quality products to the exhibition, and conducted friendly communication and exchange with exhibitors and visitors. The company is headquartered in Wuxing industrial area, Dongyuan Town, Qingtian County, Lishui City, covering an area of 20000 ㎡and a building area of 15000 ㎡. It is a professional bellows valve manufacturer integrating valve casting, whole machine R&D, production and sales. The company is committed to the R&D and production of steam system and general industrial system products, and its leading products are bellows stop valve, bellows gate valve, stop valve, check valve, Y-type filter, etc.
Time : 2020/6/16

Industrial robots offer new impetus, intelligent manufacturing makes up lost time

Government of Qingtian, gives full play to its advantages in digital economy, intelligent manufacturing, improves production capacity and accelerates the release of production capacity through industrial robots.
Recently, Zhejiang AIV Fluid Technology Co., Ltd. officially return back to regular operation. With the roar of machines, more than 20 automatic production equipment independently developed by enterprises have been fully developed and produced at full capacity. Compared with busy machines, it is difficult to find workers in such a large workshop. Behind the orderly resumption of work, it is driven by waves of "machine replacement".
Mr. Yu Shengda, general manager of Zhejiang AIV Foundry Co., Ltd
Yu: Our equipment has been upgraded to intelligent equipment, now one person can operate three to five at the same time. "Machine instead person" to achieve low-cost and efficient production mode.
Yu: Zhejiang AIV Fluid Technology Co., Ltd. settled in the Wuxing Industrial Area of Dongyuan town last year through investment attraction. It was expected that the plant would be put into production after completion at the beginning of this year. Due to the COVID-19, the start-up of the enterprise was delayed. With the continuous promotion of epidemic prevention and control work, enterprises need not only "safety valve" but also "propeller" to resume work. How to grasp production, improve production capacity and seize time has become the top priority of enterprise owners.
Yu: After the government allows the enterprises to return to work and return to production, we are also constantly scrambling for time, working extra shift at night, so by installing and debugging new equipment, and even recruiting some excellent technical workers, we have now snatched back the time lost due to the epidemic.
Mr. Cheng Fasheng, deputy mayor of Dongyuan town
Cheng: This epidemic situation forced enterprises to speed up the exploration of internal potential, demand human resources and productivity from machines, seize strategic opportunities through automation equipment, actively explore the market and speed up the release of production capacity. All of these are inseparable from the strong support provided by Dongyuan town.
Cheng: In order to enable all enterprises in the town to start work as soon as possible and "get back" the lost production time, Dongyuan town has made clear the "one-to-one",  "one enterprise, one policy", continued to carry out the whole process of epidemic prevention and control and safety production supervision and tracking, and helped solve the problem by implementing various policies of stabilizing enterprises, benefiting enterprises, resuming production and resuming work, such as "ten assisting enterprises". Insufficient funds and materials reserve and difficulties in production and operation in the process of enterprise resumption of production, improve the mechanism of enterprise appeal collection, and take measures such as precise management and control of enterprise personnel, so as to weave a dense protective net for the start-up and resumption of production of the enterprise.
Cheng: For the normal construction and production of the enterprise, we simplify the approval time, submission process and approval and acceptance procedures, as long as we meet the conditions, we will go all the way "green light".Each enterprise has a special person to be responsible for providing them with the best service.
Time : 2020/3/12

What is the difference of bellow valve

Bellow construction
The bellow cartridge is welded to both the Valve Bonnet and the Valve stem. The bellow cartridge has a number of convolutions and these convolutions become compressed or expanded depending upon the movement of Valve stem. (Scientifically speaking the bellow gets compressed when the Valve is in the open position and expanded when the Valve is in the closed condition). It is important to properly install the Valve bodies. The bellow can be sealed to the Valves in two different ways. Firstly, the bellow can be welded to the Valve stem at the top and the Valve body on the bottom. In this case the process fluid is contained inside the bellow or in second method the bellow is welded to the Valve stem at the bottom and the body on the top. In this case the process fluid is contained in the annular region between the Valve Bonnet and bellow (from the outside).
The bellow is a critical component and forms the heart of the bellow seal Valves. To avoid any twisting of the bellow the Valve must have a stem with linear movement only. This can be achieved using a so-called sleeve-nut at the Yoke portion of the Valve Bonnet. A hand wheel is fitted onto the sleeve-nut which effectively transfers a rotary motion of the hand wheel into a linear motion in the Valve stem.

Bellow types
There are two main types of bellow: the Forged Bellow and the Welded Bellow. Formed-type bellows are made from rolling a flat sheet (thin wall foil) into a tube which is then longitudinally fusion welded. This tube is subsequently mechanically or hydrostatically formed into a bellow with rounded and widely spaced folds. The welded leaf type bellow is made by welding washer-like plates of thin metal together at both the inner and outer circumference of the washers - like plates. A welded leaf bellow has more folds per unit length as compared to forged bellows. Thus, for the same stroke length, forged bellows are two to three times longer than their welded leaf counterparts.
Reportedly, mechanically forged bellows fail at random spots, while the welded leaf usually fails at or near a weld. To ensure full penetration of bellow ends and end coller welding it is advisable to fabricate using micro plasma welding.

Bellow design
The multi-ply bellow design is preferred for handling higher pressure fluids (generally two or three plies of the metal wall). A two ply bellow can increase its pressure rating by 80% to 100% as compared to a single ply bellow of the same thickness. Alternatively, if a single ply bellow of a thickness equivalent to a pressure rating of a two ply bellow is used, the stroke length is reduced. Thus, a multi-ply bellow design offers a distinct advantage over a single ply bellow. It is clear that the bellow is subject to metal fatigue and this fatigue can induce weld failure. The bellow fatigue life is affected by the material of construction, fabrication technique, stroke length and stroke frequency, in addition to the usual parameters such as fluid temperature and pressure. Bellow materials
The most popular stainless steel bellow material is AISI 316Ti which contain Titanium to withstand high temperatures. Alternatively, Inconel 600 or Inconel 625 improve fatigue strength and corrosion resistance as compared with stainless steel bellows. Similarly, Hastalloy C-276 offers greater corrosion resistance and fatigue strength than Inconel 625. Fatigue resistance can be improved by using a multiply bellows system and reducing the stroke length; this can significantly increase the bellow service life.
Time : 2018/6/9

Zhejiang AIV Fluid Technology Co., Ltd.

Zhejiang AIV Fluid Technology Co., Ltd. is a professional bellows valve manufacturer, which is headquartered in Wuxing work area, Dongyuan Town, Qingtian County, Lishui City, covering an area of 20000 ㎡ and building area of 15000 ㎡. It integrates valve casting, whole machine R&D, production and sales. The company was founded in 2016 with a registered capital of more than 11 million RMB. With a complete industrial chain, the company strives to be the first in industry with best competitive cost performance. It is a key investment attraction high-tech enterprise in Lishui City. The company has more than 200 employees, including more than 20 people with middle and senior professional titles, and 80% of all kinds of valve professionals.
In recent years, the company has invested heavily in the purchase of casting assembly line, processing center, intelligent special CNC machine tools, welding robots and other sophisticated special machinery processing equipment, and introduced full-automatic testing equipment, large caliber high-pressure testing platform, desktop spectrometer and various laboratory testers to ensure the high-quality realization of the whole process from research and development to production line.
Following the enterprise spirit of "creating value for customers", the company is positioned as a professional OEM processing manufacturer, specializing in OEM processing for domestic and foreign brands. With a complete industrial chain and one-stop upstream and downstream supporting capacity, the company aims to build the bellows valve products with the highest cost performance ratio in the industry, highlight the core competitiveness of the enterprise, win-win with partners, and achieve considerable development.
Time : 2018/2/21