Services: Sale, Download, Technical Articles

Services
Services
  • Posted: 09/25/2014 04:09:10  Clicks: 674
    Gas valves are a type of compulsive sealing valves. Nevertheless, when closing valves, pressure should be applied on disc in case of leakage in compulsive sealing. When medium enters into body through the bottom of disc, resistance which should be overcome is the thrust caused by friction between stem and packing and...
  • Posted: 09/30/2014 03:09:30  Clicks: 709
    The followings introduce classification of oil valves in common use.   1. Gate Valves Gate valves also called as paddle valves, are one of commonly used valves. The sealing faces of disc and seat have high smoothness and same roughness. They fit each other to prevent medium from flowing through. Using pattern...
  • Posted: 12/04/2014 03:12:32  Clicks: 714
    The disc of high pressure check valves is discoid, which rotate with a spindle inside channel of seat. Because of the channel is streamline form. Flow resistance of high pressure check valves is lower than that of butterfly check valves. High pressure check valves are suitable for large diameter pipelines where flow ...
  • Posted: 12/10/2014 04:12:35  Clicks: 701
    Check valves, also called as one-way valves or non-return valves, are used to stop media from flowing backward. Bottom valves in water shut of water pump also belong to check valves. Headstock piece depends on media flowing and power to open or close automatically, in order to prevent backflow. Check valves are a typ...
  • Posted: 12/18/2014 03:12:05  Clicks: 579
    Globe valves, also called as stop valves, use a plug as disc. The sealing face is plane or cone. The disc makes rectilinear motion along with the center line of fluid. According to motion form of stem, globe valves can be classified into non-rising stem globe valves and rising stem globe valves. For globe valves only...
  • Posted: 12/24/2014 03:12:15  Clicks: 642
    Pneumatic ball valves develop from plug valves. Pneumatic ball valves can also be rotated 90 degrees, the same as plug valves. The difference is that ball valves use a ball as their cock. A hole exists on ball or passageway crosses through axis of ball. When ball rotating 90 degrees, both intake and outtake should sh...
  • Posted: 12/31/2014 02:12:20  Clicks: 666
    Reasons causing sealing faces of valves damage can be classified into factitious damage and natural damage. Factitious damage includes culpable design, unskilled manufacturing, improper selection, inappropriate installation, misuse and lack of maintenance. Natural damage is the abrasion under the condition of valves ...
  • Posted: 01/28/2015 02:01:57  Clicks: 643
    Motive seal of valves mainly means stem seal. Media inside valves cannot leak out with stem moving. It is also the center of motive seal of valves. Currently, motive seal of valves is mainly with stuffing box. Basic form of stuffing box is classified into gland and gland nut.   1. Gland Gland is in common ...
  • Posted: 02/05/2015 02:02:19  Clicks: 637
    Usage of stream extraction check valves Stream extraction check valves are mainly used for stream extraction system in power plants or thermal power plants. The vales are also used for non-corrosive media such as steam and water. Stream extraction check valves prevent fatality that pressure inside turbine drop sudd...
  • Posted: 02/11/2015 03:02:58  Clicks: 665
    Design of ball valves used in pipelines requires high safety and reliability. The idea should be implemented in the whole process, including design, process specification, parts processing, type testing, product testing, quality control and after sales. Both long pipelines and urban pipelines nets are energy supply l...
  • Posted: 02/27/2015 01:02:54  Clicks: 662
    In terms of high pressure casting globe valves, passageway variation in seat has direct proportion relationship with stroke of disc. The stem of high pressure casting globe valves has relative short stroke and very reliable cutting off performance. Adding with the direct proportion relationship between passageway var...
  • Posted: 03/05/2015 01:03:23  Clicks: 651
    Valves have wide usage. Nevertheless, valves play a great role in industries. For example, in power plants, valves can be used to control operation of boilers and turbines. In petroleum and chemical industry, valves are also used to control operation of the whole production equipments and technological processes. Wor...
  • Posted: 03/11/2015 04:03:31  Clicks: 571
    Stainless steel high pressure ball valve is manufactured by using forging. The density of material is higher than that of material by casting. Forging is quite suitable for manufacturing high pressure ball valves. The closure member of stainless steel high pressure ball valve is ball. The ball rotates with center lin...
  • Posted: 03/25/2015 03:03:19  Clicks: 606
    Discs in gate valves can be classified into several categories:   1. Wedge single disc Compared with elastic gate valves, wedge single disc gate valves have simple structure; Under high temperature, the sealing is poorer than that in elastic gate valves or double discs gate valves; The valves are suita...
  • Posted: 04/01/2015 05:04:58  Clicks: 518
    The following are the tips for installing pneumatic stainless steel ball valve: There are no requirements for installing forms of pneumatic stainless steel ball valve. However, electrical motor should be installed horizontally and electrical box cover should be installed horizontally or straight up, which are advan...
  • Posted: 04/09/2015 04:04:44  Clicks: 495
    The followings are 5 features of trunnion mounted ball valve:   1. Easy operation: The ball is supported by upper and lower shafts, reducing friction and eliminating exaggerated torque caused by large sealing load due to ball driven by inlet pressure and sealing seat.   2. Reliable sealing: Sealing ...
  • Posted: 04/15/2015 04:04:46  Clicks: 708
    With national economy developing and living standard improving constantly in China, urban heating system has already replaced of household decentralized heating furnace. Currently, cities such as Beijing and Shenyang, are setting up large urban heating system. In the future, urban heating system will develop into lar...
  • Posted: 04/22/2015 05:04:04  Clicks: 615
    Hard seal ball valves and soft seal ball valves have several differences, including structure, materials and standards.   Soft sealing materials In terms of sealing materials used in ball valves, hard seal refers to the materials of seat having been processed precisely to ensure coordinating precision betw...
  • Posted: 04/30/2015 04:04:07  Clicks: 525
    How to choose flange ball valves and internal thread ball valves? Everyone has to take the factor into consideration when design pipelines.   Flange ball valves and internal thread ball valves have their own advantages. Advantages of flange ball valves: disassembling and installing ball valves in pipelines a...
  • Posted: 05/06/2015 04:05:37  Clicks: 509
    The closure member of flanged globe valve is a plug disc. The sealing face is plane or cone. The disc makes rectilinear motion along with center line of fluid. Structural styles of body include straight-through type, straight-way type and angle type.    Working principles of flanged globe valve Flange...
  • Posted: 05/13/2015 05:05:13  Clicks: 592
    Valve stem is an important accessory for valves. It is used to transmit, connecting with actuator or handle. Valves stem is also used to drive valve bore to move or rotate, realizing valves on-off or regulation.    During valves on-off, valve stem is not only moving part and stress part, but also sealin...
  • Posted: 05/20/2015 04:05:54  Clicks: 520
    Forged steel gate valves are mainly used to cut off or connect media inside pipelines. Forged gate valves are suitable for water, steam, oil, acetic acid, oxidants, urea and other media. There are three types of connection used for bonnet of forged steel gate valves:   1. Bonnet welded forged steel gate valv...
  • Posted: 06/03/2015 05:06:23  Clicks: 507
    The followings are the structural features of forged steel trunnion ball valve:   1. It is convenient for operation when opening or closing valve; 2. Body is supported by stationary shaft, eliminating overlarge torque caused by large sealing load because of inlet pressure pushing the sealing seat of body; ...
  • Posted: 06/11/2015 05:06:20  Clicks: 738
    The followings are structural features of flat gate valve:   1. Flat gate valve has two floating seats. Every seat can seal two directions of media flowing. So, flat gate valve not only can realize two-direction sealing, but also can seal inlet and outlet at the same time. The valve seat adopts O-ring and sp...
  • Posted: 06/17/2015 04:06:59  Clicks: 549
    The purpose of using gasket is that the gasket material can cause elastic deformation easily under compression load which can fill up unsmooth surface of flange sealing face to realize sealing. When connection face suffers from pressure of media, the sealing face is forced to separate. Then, the gasket is required to...
  • Posted: 03/22/2016 04:03:29  Clicks: 354
    The control valve should be well adjustable. Stop valve is suitable for water control occasion because the route is in direct proportion to closure member. Both of rotary valve and flexible valve are equipped with good water control characteristic, but it just confines to a limiting aperture. When the brake va...
  • Posted: 03/23/2016 10:03:23  Clicks: 433
    Electrical control ball valve is a rectangular structure of the advanced rotary control valve. Electrical control ball valve rotary, the structural composition consists of the rotary, angular, and electronic actuator valve and V shape valve, electrical control ball valve is powered by supply voltage, receiving the in...
  • Posted: 03/25/2016 04:03:49  Clicks: 443
    Notes of ball valve maintenance Except the regular operating conditions, keeping a concordant temperature or pressure ration, and rational corrosion data, the following tips are also unavoidable to make ball valve have a long service life time and extend its repairing period: Under the ball valve’s inactive...
Production& Management
Onero excels in ball valves, gate valves, check valves, globe valves, y-strainers, etc. We provide one-stop service including research, development, production and sale.
QualityControl and Assurance
Our production process strictly follows quality control system and make sure that there are definitely no defective products showed to customers.
CertificateCompany Honort
Zhejiang Onero Valve Manufacturer produces high quality valves. It has been granted with certifications including ISO, API, ANSI, BS, JIS, EN, GB, ASME etc.