Ceramic Saddle

Ceramic saddle is improved from the arc saddle, it changes the both arched surface to rectangular surface and makes the interior and exterior radius of curvature different, this construction overcomes the problem of nesting basically, it makes porosity distributed even and improves the distribution of the fluid , greater capacity and lower pressure drop than Raschig ring. They are available in variable sizes such as (mm): 12, 16, 19, 25, 38, 50, 76

Chemical composition

SiO2	Al2O3	Fe2O3	CaO	K2O+Na2O
>70%	23-30%	<1%	<1-2%	<2-4%

Physical properties

Index	Value
Specific gravity(g/cm3)	2.25-2.35
Water absorption(%)	<0.5
Acid-resisting strength, %Wt. Loss (ASTMc279)	<4
Firing temperature(℃)	1280-1320
Softening point(℃)	>1400
Density(kg/m3)	2350

Technical data

Spec. (inch)	Spec. (mm)	Approx. weight (kg/m3)	Surface area (m²/m³)	Free volume (%)	Packing factor (l/ft)
1/2”	12	720	623	71.7	200
3/4”	19	688	334	73	130
1”	25	688	253	73	85
1.5”	38	640	164	75	50
2”	50	577	115	77.4	37
3”	76	623	92	75.5	24

Advantage
　　These saddles are made from chemical porcelain and have excellent resistance to acids except in the case of hydrofluoric acid.
　　Moisture absorption must less than half a percent.
　　The porcelain’s specific gravity is 2.3-2.4g/cm3 and an average heat capacity (between 20℃ and 500℃ of 0.22 cal/g.℃)
　　XINTAO ceramic saddles for RTO’s softening point is 1400℃ min. And they show good thermal shock resistance during repeated cycling between 20℃ and 820 ℃.

Thermal shock test for saddles for RTO’S
　　 For example shipping the saddles over 80 M3:
　　 Randomly pick 100-200 pieces of ceramic saddles for RTO’s from the batch or shipment
　　 For each sample selected, heat it up to 820℃ and maintain them at this temperature for 30 minutes
　　 Drop the hot pieces into cold 20℃ water
　　 Repeat steps 2 & 3 for10 times on each and every piece in the sample lot.
　　 Examine the pieces and count the percent that show clear signs of breakage and/or cracking. Our standard is “less” than seven (7%) percent.