Heated Purge Desiccant Dryers(SEH Series)

StylAir SEH model dryers are external heat regenerated, twin-tower desiccant dryers designed to remove water vapor from compressed air and gas streams to a pressure dewpoint of -40°F and lower.

Heated Purge dryers are preferred in many applications for their simple, reliable design while maintaining the economy of operation of a heat regenerated dryer. StylAir SEH dryers typically use less than half the purge of a heaterless dryer. A continuous flow of dry air or gas is provided to eliminate moisture and contaminants found in all air and gas systems.

Standard Features

-40°F line pressure dewpoint
ASME Code desiccant vessels
NEMA 8 hour cycle, fully automatic operation
Fail safe operation: continuous flow on loss of power or control air
Non-lubricated valves
Tower pressure gauges on all models
Digital temperature control and indication for regeneration
Counter-current regeneration for best dewpoint
Integral cool down step to prevent dewpoint and temperature spikes at switchover
Gradual blowdown and repressurization for long desiccant life
ASME relief valve on outlet manifold
Full charge of desiccant
Heavy duty angle and channel support base
NEMA 4 electrical construction
SCR solid state heater control
Cycle Failure Alarm
120V/1Ph/60Hz operation
On-Off switch with Power-On light and sequence lights
LED pilot lights

Optional Features

-70°F to -100°F and lower line pressure dewpoint
Purge Rate Flowmeter – included on larger models
Dewpoint Demand Systems
NEMA 4X, 7 electrics
Entrainment Separators
Coalescing Prefilters
Afterfilters
Mounted filters, manual bypasses
Dewpoint monitors and alarms
Color change dewpoint indicator
Steam heat regeneration
Special designs available for flows to 30,000 SCFM and pressures to over 5000 PSIG
Construction for corrosive environments, hazardous locations, off-shore installations
Optional voltages

The StylAir regenerative desiccant dryer is a fully automatic unit designed to dry compressed air or gas to meet or exceed the customer’s requirements. The dryer consists of dual drying chambers which are alternately cycled through drying and regeneration cycles. One chamber is drying air at all times.

The wet, compressed process air flows through one drying tower where water vapor is adsorbed into the desiccant – an inert, hygroscopic material with an enormous surface to mass ratio. The off-stream drying tower is regenerated by taking a small amount of the dried process air (purge) and passing it through its bed at low (atmospheric) pressure. The moisture trapped in the desiccant is released and is carried off by the purge flow and exhausted to atmosphere. A cooling step in the cycle ensures that there are no temperature or dewpoint spikes at switchover.

Conservative Tower Sizing – Designed for Optimum Performance and Long Desiccant Life

Low upflow velocities – < 60 fpm
Long contact times – 5 sec. or more
Controlled blowdown and repressurization

SS Desiccant Support/Flow Distributors

Practically indestructible wedge-wire design prevents collapse or tearing
Cleanable and reusable

Rugged, Reliable Industrial Controls

Low watt density heathers with Incoloy elements
Integral flow switch for heater protection and low purge flow indication
UL components from controllers to terminal boards to provide that extra measure of safety
High style NEMA 4 enclosures
Microprocessor/PLC based controls provide real diagnostic info

Drying towers, heater housing and hot regeneration piping are insulated for energy savings and personnel protection.

Proven high reliability valving

Designed for air dryer service
Non-lubricated, high cycle design
Easy maintenance
Only dry, filtered pilot air is used for actuated valves

Separate desiccant fill and drain ports on all models

Standard high temp (800°F) coating provides a tough, corrosion and weather resistant finish.

SEH Series - Heated Purge

Specifications
SEH Series - Heated Purge Twin-Tower Regenerative Desiccant Air Dryers
MAXIMUM FLOW CAPACITIES (SCFM)
Model		90 PSIG			100 PSIG			110 PSIG		Conn. Size	App. Dims.	App. Wt.
SEH-	95°F	100°F	105°F	95°F	100°F	105°F	95°F	100°F	105°F		W x D x H

A08	77	66	57	84	70	62	92	79	68	3/4"	50 x 22 x 72	475 lbs.
A10	139	119	102	152	130	112	165	142	122	1"	54 x 24 x 72	600 lbs.
A10L	193	165	142	211	180	156	229	197	170	1-1/2"	54 x 24 x 90	700 lbs.
A12	277	238	205	303	260	224	330	284	244	1-1/2"	58 x 24 x 92	850 lbs.
A14	377	324	278	413	355	305	449	386	332	1-1/2"	62 x 26 x 92	1000 lbs.
A16	493	423	364	539	460	399	587	504	434	2"	66 x 30 x 96	1250 lbs.
A18	616	528	455	674	575	498	733	630	542	2"	72 x 30 x 96	1600 lbs.
A20-2.5	770	660	568	843	720	623	917	788	678	2-1/2"	68 x 38 x 96	1800 lbs.
A20-3	770	660	568	843	720	623	917	788	678	3" Flgd.	74 x 38 x 96	1950 lbs.
A24	1078	924	795	1180	1010	872	1284	1103	949	3" Flgd.	80 x 42 x 96	2300 lbs.
A30-3	1386	1188	1023	1517	1300	1121	1650	1418	1221	3" Flgd.	92 x 48 x 96	3800 lbs.
A30-4	1848	1585	1364	2022	1725	1495	2200	1891	1627	4" Flgd.	92 x 48 x 108	4600 lbs.
A36-4	2541	2179	1875	2781	2350	2056	3026	2600	2238	4" Flgd.	104 x 58 x 116	6200 lbs.
A36-6	2541	2179	1875	2781	2350	2056	3026	2600	2238	6" Flgd.	104 x 58 x 116	6500 lbs.
A42	3465	2971	2557	3792	3250	2803	4126	3545	3052	6" Flgd.	138 x 52 x 118	7900 lbs.
A48	4312	3697	3182	4719	4050	3488	5134	4412	3797	6" Flgd.	144 x 60 x 118	9800 lbs.
A54	5544	4754	4091	6067	4800	4485	6601	5672	4882	6" Flgd.
A60	6622	5678	4886	7247	6000	5357	7885	6775	5832	6" Flgd.