Rapid-sorb
®
Dispersion Tube System
DRISTEEM HUMIDIFIER DISPERSION
DRI-STEEM Corporation
a subsidiary of Research Products Corporation
DriSteem U.S. operations are ISO 9001:2015 certified
www.dristeem.com
U.S. Headquarters:
14949 Technology Drive
Eden Prairie, MN 55344
800-328-4447 or 952-949-2415
952-229-3200 (fax)
Continuous product improvement is a policy of DriSteem; therefore, product features and
specifications are subject to change without notice.
DriSteem and Rapid-sorb are registered trademarks of Research Products Corporation and are
filed for trademark registration in Canada and the European community.
Product and corporate names used in this document may be trademarks or registered
trademarks. They are used for explanation only without intent to infringe.
© 2015 Research Products Corporation
Form No. Rapid-sorb-IOM-EN-0515
Part No. 890000-621 REV A
Before you begin installation, read all dispersion instructions.
• Unpack shipment and verify receipt of all Rapid-sorb
®
components with
packing list. Report any shortages to the DriSteem factory immediately.
• When choosing a location for installation, select one that provides
necessary access in and around ductwork or air handler.
• Rapid-sorb assemblies are typically installed centered side to side in duct,
or across face of coil in air handler.
• The center line of the outer dispersion tubes should never be closer than
4.5" (114 mm) from side of ductwork or air handler wall.
• Rapid-sorb tubes are provided with an L-bracket for installation:
- NOTE: Before marking and drilling holes in duct or air handler,
refer to ALL pitch requirements for the Rapid-sorb assembly in
the instructions. Size, quantity, and location of penetrations are
determined by specific dimensions and configuration of Rapid-sorb
assembly you received.
NOTE: Hardware for mounting L-bracket to duct or air handler wall and
hardware for header support bracket is not provided. Use a fastener
of sufficient length on the L-bracket to accommodate 1/8"/ft (1%) pitch
requirements toward the 3/4" pipe thread (DN20) header drain fitting.
• Condensate drain connections to the Rapid-sorb header:
-Piping must be minimum 3/4" I.D. (DN20) and rated for 212°F
(100°C) minimum continuous operating temperature.
-Condensate drain line must be piped as shown in the figure. Provide a
2" (50 mm) drop prior to a 5" (127 mm) water seal.
• If multiple humidifiers are supplying one Rapid-sorb, a multiple steam supply
connector is needed:
-Typically, the multiple steam supply connector attaches to the Rapid-
sorb header supply end with hose cuff and clamps.
-Route the necessary number of steam supplies from the humidifier tanks
to the steam supply connector.
-Position the steam supply connector to accept the steam supplies while
maintaining the necessary pitch.
-Make sure the hose clamps on the steam supply connector and header
are tight.
Table 1-2:
Rapid-sorb header capacities
Header capacity
Header diameter
lbs/hr
kg/hr
inches
DN
≤ 250
≤ 113
2
50
251-500 114-227
3
80
501-800 228-363
4
100
Table 1-1:
Rapid-sorb tube capacities*
Tube
diameter
Insulated
(High-Efficiency
Tubes)
Uninsulated
inches
DN
lbs/hr kg/hr lbs/hr kg/hr
1½
40
43
19.5
40
18.2
2
50
80
36.4
77
35
* Capacities shown are for horizontal airflow.
If active tube length is <22” (559 mm), tube
quantity per panel may need to increase to
compensate for reduced capacity of short
tubes. Consult DriSteem or see DriCalc for
the correct calculation.
OM-7836a
OM-7837a
Table 4-1:
Rapid-sorb vertical air flow installations
Tube
diameter
Without condensate drain*
With condensate drain*
Insulated
Noninsulated
Insulated
Noninsulated
inches
DN
lbs/hr kg/hr lbs/hr kg/hr lbs/hr kg/hr lbs/hr kg/hr
1 ½
40
29
13
28
13
65
30
62
28
2
50
65
30
62
28
97
44
93
42
* Face heights of less than 26" (660 mm) may have reduced tube capacities.
FIGURE 4-1: VERTICAL AIR FLOW INSTALLATION
Header Outside
Header Inside
Notes:
• Pitch header towards drain 1/8" per
foot (1%).
• Position L-bracket so the flange is
upstream of dispersion tubes.
• Use L-bracket as a template to locate
holes on duct wall.
