4
845.778.5566 ● Fax: 845.778.7123 ●
www.nicholsonsteamtrap.com
Thermal actuator is filled at its free length with a
liquid having a lower boiling point than water. On
start-up, valve is normally open to discharge air,
non-condensibles and condensate. When steam
enters trap, thermal actuator fill vaporizes to a
pressure higher than line pressure. This forces
valve into seat orifice to prevent any further flow. As condensate collects, it takes heat from the actuator, lowering
internal pressure. Line pressure will then compress thermal
actuator to open valve and discharge condensate. Valve
opening automatically adjusts to load conditions from minimum on very light loads to full lift at maximum load.
CDS SANITARY
THERMOSTATIC
STEAM TRAPS
Pressures to 100 PSIG (6.9 barg)
Temperatures to 338°F (170°C)
Steepest Interior Surfaces—Designed to completely drain
without puddling.
Stainless Steel Body—Body Material is 316L Stainless
Steel with 20 µ in. (0.5 µm) Ra internal finish and 32 µ in.
(0.75 µm) Ra external finish. Available with mechanical polishing to 10 µ in. (0.25 µm) Ra and/or electropolish.
Self centering Valve—Leak tight shut off. Assembly of
actuator and valve to impingement plate allows the valve to
self align with center of the orifice.
Temperature Sensitive Actuator—One moving part. 316L
Stainless Steel, fail open, welded actuator for maximum
corrosion, thermal and hydraulic shock resistance.
Directional Discharge—Erosion prevented by directing
discharge to center of piping.
Maintenance—Can be easily removed and disassembled
for sterilization and/or repair.
Three Year Guarantee—Guaranteed for three years
against defects in material or workmanship.
Industry Standard Food Grade Gasket—White Viton food
grade gasket offers superior performance for higher pressure
steam applications.
Large Orifice Selection—Broad selection of orifice sizes
provide greatest sizing and selection flexibility.
Superior Air Handling—Best air handling capability pro-
vides for fast startup.
Unique SLR Orifice OptionSpecify when immediate elimi-
nation of condensate and improved sensitivity is desired.
An orifice on the valve allows for continuous discharge of
condensate. Trap will nominally pass 50 lb/hr (22.7 kg/hr)
of condensate at 50 psi (3.4 barg) within 0.5ºC (1°F) of saturated temperature.
Bar Stock—Connectiion fittings are not welded onto inlet
and outlet pieces.
MODELS
● CDS202–Low capacity
● CDS203–Medium capacity
● CDS204–High capacity
NOTE: Please specify if Material Test Reports (MTR) or Certificates of
Conformance (COC) are required.
APPLICA TIONS
● CIP/SIP System Condensate Drainage
● Sterilization of Process Vessels
● Culinary Steam
● Humidifiers
● WFI System Sterilization
● Fermenter Sterilization
OPTIONS
● MP - Mechanical Polish to 10 µ in. (0.25 µm) Ra
● EP - Electropolish
● SLR - SLR Orifice
● Tef-Steel, PTFE, Teflon®, E.P.D.M., USP Class VI
& other gasket materials available
● -B Bellows for low subcool
● 6" Condensate Leg (CME-W25, CME-A)
APPLICABLE CODES
● ASME BPE
Canadian Registration # 0E0591.9
O
PERATION
O
PERATION
845.778.5566 ● Fax: 845.778.7123 ●
www.nicholsonsteamtrap.com
5
Connections:
1/2" – 11⁄2" Hygienic Clamp
CDS SANITARY THERMOSTATIC
STEAM TRAPS
SPECIFICATION
Steam trap shall be of balanced pressure design with 316L welded bellows capable of
releasing condensate within 1ºC (2-3ºF) or 5ºC (10°F) of saturated pressure. All other
interior wetted components shall be of 316L stainless. It shall have interior body finish
of at least 20 µ in. (0.5 µm) Ra and exterior body finish of at least 32 µin. (0.75 µm) Ra.
Trap shall utilize hygienic body clamp allowing disassembly for inspection or cleaning
and be entirely self draining when installed in vertical configuration. Trap end connections shall be standard hygienic clamp. Thermostatic actuator shall employ a conical
valve lapped to the seat. A minimum of three orifices shall be available.Traps shall have
SLR orifice where drainage at saturated temperatures is required. Traps shall be
guaranteed against defects for 3 years.
MAXIMUM O
PERATING CONDITIONS
PMO: Max. Operating Pressure 100 psig (6.9 barg)
TMO: Max. Operating Temperature 338°F (170°C)
PMA: Max. Allowable Pressure 150 psig (10.3 barg)
TMA: Max. Allowable Temperature 366°F (186°C)
BODY SURFACE FINISH
Internal <20 µ in. (0.5 µm) Ra SFCI.External <32 µ in. (0.75 µm) Ra. Optional
mechanical polishing to 10 µ in. (0.25 µm) Ra and/or electropolish SFC4
GASKET APPROVALS
FDA CFR Title 21 Part 177, USDA, USP Class VI, 3A Sanitary Standard, NSF
SERVICE NOTES
Trap is designed to be self draining for vertical installation (discharge down)
1
/2" - 3/4" service trap should be installed with 3/4" inlet gasket.
1" - 11/
2" service trap should be installed with 1
1
/
2" inlet gasket.
SLR ORIFICE OPTION
Specify when immediate elimination of condensate and improved sensitivity is desired. An orifice on the valve allows for continuous discharge of
condensate. Trap will nominally pass 50 lb/hr (22.7 kg/hr) of condensate
at 50 psi (3.4 barg) within 0.5ºC (1°F) of saturated temperature.
POLISHING PROCEDURE
All surface finishes are achieved without the use of additional buffing,
compounds or grit.
-B BELLOWS
1ºC (2-3ºF) subcool for sensitive applications under 40 psi (2.7 barg)
Maximum Capacity
—lbs/hr 10°F Below Saturation (Kg/hr 5°C Below Saturation)
Differential PSIG (bar)
Trap Orifice
5 102030405060708090100
Inches (0.34) (0.7) (1.4) (2.1) (2.8) (3.4) (4.2) (4.9) (5.6) (6.2) (6.9)
CDS 202 5/32
291 411 581 719 831 919 1000 1075 1130 1174 1207
(132) (186) (264) (326) (377) (417) (454) (488) (513) (533) (547)
CDS 203 1/4
550 825 1210 1495 1750 1975 2175 2350 2525 2650 2825
(249) (374) (549) (678) (794) (896) (987) (1066) (1145) (1202) (1281)
CDS 204 5/16
1520 1671 1869 2128 2301 2509 2713 2819 2946 3091 3159
(689) (758) (848) (965) (1044) (1138) (1230) (1278) (1336) (1402) (1433)
MATERIALS OF CONSTRUCTION
Item Part Name Material
1 Body – Inlet 316L A276
2 Actuator Nut 316L
3 Gasket Viton 3227
4 Actuator 316L
5 Body – Outlet 316L A276
6 Valve 316L
7 Clamp (not shown) 304
8 Impingement Plate 316L
Service A B C Weight
1
⁄2 and
3
⁄
4
21⁄2 25⁄8
63
⁄64 1.8
(63) (67) (25) (.8)
1 and 1
1
⁄2
21⁄2 25⁄8 163⁄64 2.3
(63) (67) (50) (1.0)
For Kg/Hr Multiply by .454For Kg/Hr Multiply by .454
NOTE: Please specify if
Material Test Reports
(MTR) or Certificates of
Conformance (COC) are
required.
A
B
C
C
8
7
6
1
2
3
4
5
DIMENSIONS inches (mm) and WEIGHTS pounds (kg)
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