Hollow metal O-rings

Hollow metal O-ring Model: ZD-G2030 hollow metal O-ring hollow metal O-ring, it is a thin-walled steel, stainless steel, Monel, Inconel alloy tube or pipe bent into a circle or other pads, etc. shape, then the interface welding, fine grinding and the formation of a special seal. Hollow metal O-ring, due to the special structure and material, particularly suitable for other seals difficult to achieve a high temperature (up to 800 ℃), cryogenic (minimum of -270 ℃), high pressure (up to 1400kgf / cm2,), high vacuum (up to 10-9 mm Hg) and other conditions of static sealing, widely used in petroleum, chemicals, chemical fiber, metallurgy, aviation, aerospace and other industries, not only for small diameter, but also for large-diameter work occasions. Hollow metal O-ring can be divided into the following three standard types: hollow chamber 1. Ordinary hollow metal O-ring is a closed space for normal pressure (atmospheric pressure), by a hollow ring to maintain greater flexibility, general applicable to the use of the vacuum and less than 70kgf / cm2 of pipe or vessel flange. 2. inflatable hollow metal O-ring on the inside or outside of the ordinary hollow O-rings to open a number of holes of the tube lumen in communication with the media, it belongs to a self-tightening ring, the sealing performance than ordinary hollow O-ring Well, for pressure higher than 70kgf / cm2 working conditions. 3. Since the tight metal hollow O-ring this ring is enclosed in an inert gas cavity, when the working state at high temperatures, the high temperature gas effect and severe swelling, strengthen the ring elasticity at high temperatures, suitable for high temperature (up to 800 ℃) working conditions. Hollow metal O-ring Features: 1 has good sealing performance, high temperature, high pressure resistance, chemical resistance and excellent air tightness. Especially suitable for high temperature and high pressure low medium high vacuum seal 2. The seal preload can be achieved. Applications: used in aerospace machinery, vacuum equipment, semiconductor-related machinery, nuclear equipment, electronic equipment, mixers, melt spinning apparatus, hydraulic machinery and other mechanical equipment. Hollow metal O-rings using a variety of forms selected: Conditions ring material plated or coated Temperature (℃) pressure (kg / cm) -250 - + 100 10-6 - ≤30> 30 inflatable ordinary stainless steel , aluminum. Cryogenic conditions, ring and flange bolts with materials in general gas, when the volatile liquid medium, ring surface silver or stainless steel ditto ditto ditto Teflon 100--300 300--400 ≤40 Ordinary Inconel alloys generally gases, volatile liquids, the surface of silver rings> 40 inflatable> 400--540 self-tightening type> 540--700 ≤40 self-tightening type Inconel silver plated> 40 inflatable hollow metal O-rings choice of coating or plating different temperatures: Temperature (℃) plated or coated -60-- + 350 copper, silver> 350 silver, gold, platinum -60-- + 120 polytrifluorochloroethylene -60-- +250 Teflon following table for common metal hollow metal O-ring material selection: Material short name tag hardness (HB) Temperature (° C) copper aluminum L3 35 200 T3 80 260 Carbon (Carbon steel) CS 120 -40 ~ + 540 SS 304 304 130 ~ 180 -195 ~ + 550 SS 316L 316L 130 ~ 180 -100 ~ + 550 SS 321 321 130 ~ 190 -195 ~ + 760 HASTELLOR-B2 HASTB 215 -185 ~ + 1090 INCONEL -600 INC600 150 -100 ~ + 1090 MONEL-400 MON 150 -130 ~ + 820 titanium TI 215 -195 ~ + 1090 metal hollow O-ring storage 1. The metal hollow O-ring does not allow mixed with other goods piled up, to prevent bumps, scratches and bruised. 2. metal hollow O-ring is not allowed contact with the active chemical agents, to prevent corrosion. Hollow metal O-ring installation before installation, you should carefully check and clean the surface of the seal groove, does not allow radial, cross-like scratches, dents and other attachments. Install slot design metal O-ring: In general priority rectangular slot, only under special pressure, ultra-high vacuum used in circumstances triangular groove. For rectangular groove: 1. In a free state, the outer diameter of the groove is greater than the outer diameter of circle 0.1 ~ 0.3mm; h 2. groove depth should be calculated based on the desired pre-determined degree of flattening, generally as follows (W 0 is a sectional diameter circle): A: For the cross-section of small diameter ring h = (0.66 ~ 0.75) w; B: for large cross-section diameter of the ring h = (0.8 ~ 0.9) w; specific dimensional tolerances shown in Figure (a ring The outer diameter of 100mm as an example); D2 = D1 + D3 h = d * 0.8 Ordering Information: 1. Can provide samples or size according to user production; 2. Can be based on user design working conditions, including working conditions : work pressure, temperature, the working medium; 3. Users can provide mating seal groove form structure and corresponding dimensions and materials. Hollow metal O-ring technical standards: to provide any standard and non-standard sizes, including ASME, DIN, JIS, GB and other standards. Available round, square and other profiled shape