Armstrong TC Series thermostatic clean steam traps are designed to handle the special requirements of clean steam systems. The series includes the T-316L stainless steel TC-C, TC-R, and TC-S models, which offer different body configurations to allow for a choice of piping and ease of cleaning. The thermostatic design is free-draining and can operate close to steam temperature at any given pressure. Additionally, the TC-300 series is specifically designed for instrument tracing with extremely low condensate loads.

Features and Applications

Features:

• Constructed of 316L stainless steel for corrosion resistance (TC-C, TC-R, TC-S)
• Highly polished for cleanability
• Self-draining to minimize contamination
• Compact and lightweight
• Easy to install and disassemble for cleaning

Typical Applications:

• Fermentors and Bioreactors
• Sterilizers/autoclaves
• Process piping
• Block and bleed
• CIP/SIP systems
• Equipment sterilization and sterile barriers

Model Variants

• Model TC-C: Clamp with sanitary body clamp. Available with 1/2", 3/4", and 1" sanitary end connections.
• Model TC-R: Repairable with bolted body and cap. Available with sanitary, threaded, or tube end connections.
• Model TC-S: Sealed design. Available with sanitary, threaded, or tube end connections.
• Model TC-300: Thermostatic diaphragm trap for instrument tracing.

Materials and Specifications

TC-C, TC-R, and TC-S (Clean Steam)

Model	TC-C Clamp	TC-R Repairable	TC-S Sealed
Cap and body	316L stainless steel	316L stainless steel	316L stainless steel
Bellows	316L stainless steel	316L stainless steel	316L stainless steel
Body gasket	Viton	Viton	—
Retainer	316L Stainless steel	316L Stainless steel	316L Stainless steel
Clamp / Screws	304 SS Clamp	304 SS Screws	—
Interior Finish	≤ 0.5 μm Ra	≤ 0.5 μm Ra	≤ 1.6 μm Ra
Exterior Finish	≤ 0.8 μm Ra	≤ 0.8 μm Ra	≤ 0.8 μm Ra

Physical Data	TC-C Clamp	TC-R Repairable	TC-S Sealed
Max Allowable Pressure	8.3 bar (120 psig)	8.3 bar (120 psig)	10 bar (150 psig)
Max Allowable Temp	177°C (350°F)	177°C (350°F)	186°C (366°F)
Max Operating Pressure	7 bar (100 psig)	7 bar (100 psig)	8.3 bar (120 psig)
Weight	0.57 kg	0.68 kg	0.34 kg

TC-300 (Instrument Tracing)

Specification	TC-300
Connections	BSPT Threaded, Socket Weld, Flanged
Body / Cap Material	Carbon Steel
Internals Material	304 Stainless Steel
Max Allowable Pressure	2.4 MPa @ 350°C
Max Operating Pressure	2.4 MPa

Capacities

TC-C, TC-R, and TC-S Capacities

Differential Pressure (bar)	5°C Subcool (kg/h)	11°C Subcool (kg/h)
0.35	82	145
0.7	163	293
1.4	307	503
2.1	458	709
2.8	561	830
3.5	699	915
4.1	837	1,136
4.8	924	1,210
5.5	1,071	1,356
6.2	1,116	1,468
6.9	1,155	1,565
7.6	1,184	1,651
8.3	1,206	1,712

INFO

Capacities based on differential pressure with no back pressure. Capacities will vary with the degree of subcooling. When greater capacities are required, the trap will automatically adjust to the load, up to the maximum (cold water) capacity shown, by increasing the amount of subcooling.

TC-300 Capacities

Differential Pressure (MPa)	Cold Water 21°C (kg/h)	Hot Water 100°C (kg/h)	10°C Subcool (kg/h)
0.035	54	45	4.5
0.07	68	77	5.9
0.14	145	113	8.2
0.35	222	181	11.8
0.7	295	263	15.9
1.05	318	318	18.1
1.4	408	363	20.9
1.7	454	431	22.7

Installation and Maintenance

Installation

The Clean Steam Traps are intended to be installed in vertical lines with downward flow in order to ensure that the trap is self-draining. Verify that the flow direction arrow on the trap is in the correct downward position. If the steam trap has sanitary end connections, do not over-tighten clamps during installation.

Maintenance Safety

Equipment under pressure - Operating temperature > 100°C. Make sure the trap is cold before handling!

Thermostatic Element Replacement (TC-C and TC-R):

1. Remove the complete trap from the steam line.
2. Open and remove the clamp (TC-C) or unscrew the bolts (TC-R) and lift the cap.
3. Remove the gasket and the thermostatic element assembly.
4. Clean trap cap and body if necessary.
5. Replace the gasket and the thermostatic element assembly.
6. Put the cap back on the body and secure the clamp or bolts.

INFO

Model TC-S sealed traps are a welded non-repairable design and must be replaced when the trap's service life has expired.