Seyang Coporation

Products

Through autonomy and creativity Global Leading Engineering Company Seyang Corporation.

DSI Series

Internal heater-type
air dryer

It has 4-5% of regeneration air consumption and has low density heater (extends product life and protects adsorbent) with a regenerative system (with attached thermal conduction pin) which maximizes thermal efficiency.

DSI Series

Product Specifications

Regenerative system with maximized thermal efficiency. (thermal conduction pin attached)
Low-density heater design. (extends product life and protects adsorbent)
4-5% of regeneration air consumption.

Structure Diagram

How it works

Moisture is absorbed by the adsorbent ashumid air at the inlet pointtravels up the drying tower.
Somedry air at the outlet pointis heated by the external regenerative heater and descends towards the regeneration tower. Moisture of the adsorbent is evaporated, dried and discharged to the atmosphere through the purge valve.
Moisture in the regeneration tower is sufficiently dried, stopping the heater while regeneration air continues to be discharged, cooling the adsorbent.
As such, the 8-hour operating cycle is composed of 4 hours of drying, 2.5 hours of heating, and 1.5 hoursof cooling and pressure equalization.

Model Description

Maximum Inlet Temperature	55℃
Ambient Temperature	5~49℃
Working Pressure	1.5~9.9 kg f/㎠
Power Supply	220/440V, 50/60Hz, 3￠

MODEL	Inlet Temp.: 38°C, Inlet Pressure: 7 ㎏f/㎠, Dew Point under pressure: -40°C and below
MODEL	Treating Flow Rate (㎟/MIN)	Max. Heater Capacity (KWH)	Avg. Power Consumption (KWH)	Activated Alumina Gel ChargedVolume (kgs/lower)
DSI-120	3.3	2.2	1.4	44
DSI-160	4.7	3.1	1.9	61
DSI-260	7.6	5.1	3.2	99
DSI-370	10.7	7.1	4.4	139
DSI-450	13	8.7	5.4	168
DSI-590	17	11.4	7.1	220
DSI-750	22	14.7	9.2	285
DSI-930	27	18.7	11.3	350
DSI-1130	33	22.1	13.8	428
DSI-1350	39	26.2	16.4	505
DSI-1750	51	34.3	21.4	661
DSI-2100	61	41.0	25.6	790
DSI-3000	87	58.5	36.6	1127
DSI-4100	119	80.0	50.0	1542

* Possible to manufacture models with operating pressure larger than 10 ㎏f/㎠.
* Possible to manufacture models larger than standard conditions mentioned above.

Conversion Coefficient

Table1- Conversion Coefficient by Inlet Pressure

Inlet Pressure (kgf/㎤)	2	3	4	5	6	7	8	9	10
Conversion Coefficient	0.38	0.5	0.63	0.75	0.88	1	1.12	1.25	1.37

Table2- Conversion Coefficient by Inlet Temperature

Inlet Temperature (℃)	25	30	35	38	40	43	45	50	55
Conversion Coefficient	2.0	1.52	1.17	1	0.9	0.78	0.7	0.56	0.44

Model Selection and
Calculating Working Volume Flow Rate

MODEL : DSI-750

What’s the working volume flow rate when inlet temperature is 40°C with inlet pressure of 5kgf/㎠ ?
Standard working volume flow rate of DSI-750: 22 N㎥/min
Conversion Coefficient for 40°C of temperature: 0.9
Conversion Coefficient for 5kgf/㎠ of pressure: 0.75
* Working Volume Flow Rate = 22 N㎥/min x 0.9 x 0.75 = 14.85 N㎥/min
Which model should be used when working volume flow rate is 35 N㎥/min with 45℃ of inlet temperature and 8 kgf/㎠ of inlet pressure ?
Adjusted working volume flow rate under standard Condition (38℃ of inlet temperature, 7kgf/㎠ of inlet pressure)
= 35 N ㎥/min / 0.7 (Conversion Coefficient for temperature) / 1.12 (Conversion Coefficient for pressure)
= 44.64 (N ㎥/min)
* DSI-1750 on the working volume flow rate index by model.

Specifications
by DSI model

MODEL	A	B	C	D	E	F	G	H
DSI-120	800	740	950	890	370	2020	2500	PT1 1/2""F
DSI-160	850	790	1000	940	370	1720	2210	PT1 1/2""F
DSI-260	1200	1100	1140	1040	410	1910	2447	PT1 1/2"F
DSI-370	1200	1100	1250	1150	416	1904	2447	2"F
DSI-450	1300	1200	1350	1250	416	1814	2373	2"F
DSI-590	1450	1350	1400	1300	468	1892	2476	2.1 /2"F
DSI-750	1510	1410	1450	1350	468	1902	2492	2.1 /2"F
DSI-930	1720	1620	1700	1600	567	1663	2373	3"F
DSI-1130	1800	1700	1750	1650	567	1807	2524	3"F
DSI-1350	2000	1900	1800	1700	579	1837	2568	3"F
DSI-1750	2250	2150	2050	1950	640	1854	2628	4"F
DSI-2100	2300	2200	2100	2000	680	1854	2628	4"F
DSI-3000	2400	2300	2150	2050	680	1894	2706	4"F
DSI-4100	2950	2825	2600	2475	790	1934	2845	6"F