Double eccentric hemispherical valve range of applications and structural features

Double eccentric hemispherical valve introduction: Double eccentric hemispherical valve using eccentric valve body, eccentric ball and valve seat, valve stem for rotational movement in the common trajectory automatic centering, the process of closing off the more the more tightly, fully achieve the purpose of a good seal. The double-eccentric hemispherical valve is completely separated from the valve seat, eliminating the wear of the sealing ring and overcoming the problem that the conventional ball valve seat and the ball sealing surface always wear. The non-metallic elastic material is embedded in the metal seat and the valve seat metal surface is well-received protection of. Double eccentric hemisphere valve applications: eccentric hemisphere valve products are particularly suitable for steel, aluminum, fiber, small solid particles, pulp, coal ash, LPG and other media. Due to welding different alloys (or combination of ball) bimetal sealing pair of optional eccentric hemispherical valve can be used for wear-resistant, corrosion-resistant, high temperature and require strict sealing conditions. 1, common eccentric hemisphere valve: Specifications Model DN40-1600. Suitable for sewage treatment, pulp, urban heating and heating and other demanding occasions 2, the eccentric chemical semi-spherical valve: DN40-1600 specifications. For crude oil, heavy oil and other oil products, weak corrosive chemical industry, two-phase mixed media 3, eccentric gas hemisphere valve: Specifications DN40-1600. For gas, natural gas, liquefied gas transport control 4, slurry-specific eccentric hemisphere valve: Size DN40-1600. For liquid, solid two-phase mixed flow or liquid transport chemical reaction with crystallization or scaling industrial pipeline 5, coal ash slag valve: size DN40-1600. Structural characteristics: 1, the valve structure using eccentric tight tight principle through the transmission mechanism to achieve the purpose of regulating, closing, sealing pair is a metal surface zone belt Hard-surface contact seal, the double-eccentric structure is open when the spool is located in the possession of the ball room, the flow cross-section, and the valve is not washed, the valve core is not washed off when closed, open when the valve core gradual spherical seat along the effective removal of knot Scale barriers, to achieve a reliable seal. It is particularly effective for mixed flow delivery of two-phase flow-prone fouling solids. 2, the valve hemisphere with bimetallic, base metal surfacing on different alloys, the valve seat is also the corresponding surfacing by special treatment, the sealing surface into anti-corrosion, wear-resistant, high strength and other types to meet the needs of different occasions . 3, sealed tightly, delivering zero harmful gas leakage. 4, the seal of the spool left compensation, when the valve to do wear, turn off a little while, can be reliably sealed, extending the service life. In addition, the user will squeeze the nut twist off, seat adjustment or replacement valve is still available, to avoid the failure of the valve seal, the entire scrap defects.

1200nm LED

We are 1200nm LED manufacturer from China.

We will do the High temperature resistance testing and 10 hours ageing treatment before the product out off the factory, which can ensure the stability of each product.

Our LED products have 5 year warranty.

We are the best supplier for your light-emitting diode.

We supply variety of 1200nm IR LED(Infrared LED) products. Including Through-hole 1200nm LED, SMD 1200nm LED and high-power 1200nm LED. We can also produce 1200nm LED according to your requirement.


For the Through-hole Light Emitting Diode 1200nm LED,

We can customize the shape, the lighting angle, the number of emitting source, the flat pin LED and braided LED. Such as: infrared 5mm 1200nm LED with 5 degree, infrared 5mm 1200nm LED with 20 degree, infrared 5mm 1200nm LED with 30 degree, infrared 5mm 1200nm LED with 45 degree, infrared 5mm 1200nm LED with 60 degree, infrared 5mm 1200nm with 90 degree, infrared 5mm 1200nm LED with 120 degree. Infrared 3mm 1200nm LED with 3 degree, infrared 3mm 1200nm LED with 20 degree, infrared 3mm 1200nm LED with 30 degree, infrared 3mm 1200nm LED with 45 degree, infrared 3mm 1200nm LED with 60 degree, infrared 3mm 1200nm with 90 degree, infrared 3mm 1200nm LED with 120 degree ect.

There are many other shapes or color of lens for your choose. Customized infrared LED are available


For the SMD LED 1200nm LED,

We can supply dual-chip infrared LED, three-chip infrared LED, multi-chip infrared LED, high voltage LED, flashing infrared LED and variety of size SMD LED. For instance: 3528 SMD infrared 1200nm LED, 2835 SMD infrared 1200nm LED, 3014 SMD infrared 1200nm LED, 1206 SMD infrared 1200nm LED, 3020 SMD infrared 1200nm LED.
There are also have many other shapes to choose, like the 5050 SMD infrared LED, the 5730 SMD infrared LED ect. You can choose any one of them for your requirement.


1200nm led is a infrared LED(IR LED). Common infrared LEDs are like: 1200nm IR LED, 1250nm IR LED and so on.

1200nm LED, 1200nm Infrared LED, 1200nm IR LED, High Power 1200nm IR LED

Shenzhen Best LED Opto-electronic Co.,Ltd / BESTSMD CO LIMITED(HK) , https://www.bestsmd.com