Clean steam > Steam separators
CS10-1 Stainless Steel Clean Steam Separator
CS10-1 is a 316L clean steam separator for removing entrained moisture from clean and pure steam lines where steam dryness, inspectability and material traceability matter.
Quick facts
The Spirax Sarco CS10 clean steam separator, identified as CS10-1 in the technical information, is designed for clean and pure steam systems. Its purpose is to remove entrained moisture before the steam reaches a steriliser, autoclave, control valve, instrument or other hygienic point of use. Removing moisture at this stage helps the distribution system deliver drier, more consistent steam and reduces the risk that condensate will be carried into equipment that needs a stable steam condition.
This clean steam separator is intended for projects where steam quality, inspection access and material traceability must be considered together. It is a conditioning component rather than a clean steam generator or a particulate filter: the upstream source still has to produce the required steam, while filtration and condensate drainage should be selected separately where the process requires them.
A removable internal baffle is central to the CS10-1 design. It allows the separator to be inspected fully before installation and makes internal inspection of the system more practical during project verification. The body and the cover with baffle are fabricated from 1.4404/316L stainless steel. The standard internal surface finish is a maximum of 0.5 µm (20 µin) Ra, with welds ground and electropolished; the external surface is a maximum of 1.6 µm (63 µin) Ra with a satin bead-blast finish. These details matter when a hygienic installation needs a documented finish instead of an unqualified general-purpose vessel.
The component materials are also stated clearly in the technical information: the seal is Viton and the clamp is stainless steel, identified as AISI 316. This gives the project team a defined starting point for checking compatibility, cleaning requirements and the certificates that must accompany the order.
The CS10-1 product literature describes steam dryness above 95%. That figure should be read together with the selection conditions rather than treated as an independent guarantee: separator size, steam pressure, mass flow, line internal diameter, velocity and pressure drop all influence the result. The technical sizing example states that a separator curve operating below 27 m/s will operate at near 100% efficiency, and it recommends selecting the best compromise between line size, velocity and pressure drop for the application.
For example, the metric sizing example in the technical sheet uses 500 kg/h at 6 bar g, selects a 2 inch (DN50) separator and indicates an approximate pressure drop of 0.012 bar. This is a worked example, not a universal capacity rating. A project should use its own operating pressure, flow and pipe standard when confirming the size.
Steam inlet and outlet sizes run from 1/2 inch to 2 inch. Sanitary clamp arrangements are documented for ASME BPE and DIN 32676 A and B dimensions, with other connection arrangements available on request. The technical sheet identifies a 1 inch drain and a 1/2 inch vent in the dimensional data. Confirm the sanitary clamp and gasket rating together with the final connection specification because the gasket or clamp can restrict the allowable pressure and temperature.
The body design condition is PN10. For saturated steam service, the maximum operating pressure is 7.6 bar g. The maximum allowable temperature is 250 °C, the minimum allowable temperature is -10 °C, and the minimum operating temperature is 0 °C. The stated maximum operating temperature is 250 °C at 6.8 bar g. These are selection boundaries, not a replacement for the pressure/temperature chart and the complete order review.
The CS10-1 is designed for horizontal lines. Before commissioning, check the flow arrow and the intended orientation, and handle the body and internals carefully so the specified surface finishes are not damaged. Planning should also allow access to the removable baffle and the withdrawal distance shown in the dimensional information.
The product is designed in accordance with the ASME BPE guide and the technical sheet states compliance with the EU Pressure Equipment Directive and UK Pressure Equipment (Safety) Regulations. Polymers are stated to comply with FDA 21 CFR 177.2600; 1/2 inch, 3/4 inch and 1 inch sizes are available with USP Class VI. Depending on the project requirement, certificates can include EN 10204 3.1 material certification, certificates of conformity, passivation, welding and internal surface finish. These inspection and certification requirements need to be specified when the order is placed.
Before requesting a quotation for the Spirax Sarco CS10, confirm the CS10-1 size, steam pressure and flow, pipe standard, sanitary connection and gasket, drain and vent routing, horizontal installation space, required surface finish and the certificates needed for the quality file. When steam quality also depends on particulate control, review the CSF16 clean steam filter as a separate conditioning stage. When the project needs a dedicated source of clean steam before separation, compare the clean steam generator range with the complete system duty.
The CS10-1 clean steam separator has been designed in full accordance with the ASME BPE guide to remove entrained moisture from clean and pure steam systems. A removable baffle plate allows the unit to be fully inspected before installation and facilitates system internal inspection.
| Surface | Finish |
|---|---|
| Internal | 0.5 µm (20 µin) Ra maximum / SF5, as outlined in ASME BPE; welds ground and electropolished. |
| External | 1.6 µm (63 µin) Ra maximum, satin bead-blast finish. |
Certification is available for EN 10204 3.1 materials, conformity, passivation, welding and internal surface finish. State certification and inspection requirements when placing the order.
Packaging is conducted in a clean environment segregated from other non-stainless-steel products and in accordance with ASME BPE. Connections are fitted with protective caps before the product is sealed in a plastic bag.
| Connection | ASME BPE sanitary clamp | DIN 32676 A | DIN 32676 B |
|---|---|---|---|
| Steam inlet and outlet | 1/2 inch | DN15 | DN15 |
| Steam inlet and outlet | 3/4 inch | DN20 | DN20 |
| Steam inlet and outlet | 1 inch | DN25 | DN25 |
| Steam inlet and outlet | 1-1/2 inch | DN40 | DN40 |
| Steam inlet and outlet | 2 inch | DN50 | DN50 |
| Drain | 1 inch | DN25 | DN25 |
| Vent | 1/2 inch | DN15 | DN15 |
Other connections are available upon request. The page 2 source table prints a different vent nominal size; the dimensional table on page 6 and the corresponding Chinese technical issue identify the vent as 1/2 inch. Confirm the final vent connection on the order.
| No. | Part | Material |
|---|---|---|
| 1 | Body | Fabricated stainless steel, 1.4404 / 316L |
| 2 | Cover + baffle | Fabricated stainless steel, 1.4404 / 316L |
| 3 | Seal | Viton |
| 4 | Clamp | Stainless steel, AISI 316 |
For hygienic or sanitary clamp ends, the maximum pressure and temperature may be restricted by the gasket or sanitary clamp used. Consult Spirax Sarco.
| Condition | Value | Imperial equivalent |
|---|---|---|
| Body design conditions | PN10 | |
| PMA - maximum allowable pressure | 10 bar g at 50 °C | 145 psi g at 122 °F |
| TMA - maximum allowable temperature | 250 °C | 482 °F |
| Minimum allowable temperature | -10 °C | 14 °F |
| PMO - maximum operating pressure, saturated steam service | 7.6 bar g | 110 psi g |
| TMO - maximum operating temperature | 250 °C at 6.8 bar g | 482 °F at 99 psi g |
| Minimum operating temperature | 0 °C | 32 °F |
| Maximum cold hydraulic test pressure | 15 bar g | 218 psi g |
The example is based on imperial outside-diameter tubing delivering 500 kg/h of steam at 6 bar g.
| Pipe type | Measure | 1/2 inch | 3/4 inch | 1 inch | 1-1/2 inch | 2 inch |
|---|---|---|---|---|---|---|
| Schedule 40 pipe | I/D (mm) | 15.80 | 21.00 | 26.60 | 40.90 | 52.50 |
| Factor | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | |
| Imperial O/D tubing | I/D (mm) | 9.40 | 15.75 | 22.10 | 34.80 | 47.50 |
| Factor | 2.83 | 1.45 | 1.45 | 1.38 | 1.22 | |
| Hybrid DIN 11850 pipe | I/D (mm) | 15.00 | 19.00 | 25.00 | 37.00 | 49.00 |
| Factor | 1.11 | 1.13 | 1.13 | 1.22 | 1.15 |
The imperial example is based on imperial outside-diameter tubing delivering 1100 lb/h of steam at 87 psi g.
| Pipe type | Measure | 1/2 inch | 3/4 inch | 1 inch | 1-1/2 inch | 2 inch |
|---|---|---|---|---|---|---|
| Schedule 40 pipe | I/D (in) | 0.62 | 0.83 | 1.05 | 1.61 | 2.07 |
| Factor | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | |
| Imperial O/D tubing | I/D (in) | 0.37 | 0.62 | 0.87 | 1.37 | 1.87 |
| Factor | 2.83 | 1.45 | 1.45 | 1.38 | 1.22 | |
| Hybrid DIN 11850 pipe | I/D (in) | 0.59 | 0.75 | 0.98 | 1.46 | 1.93 |
| Factor | 1.11 | 1.13 | 1.13 | 1.22 | 1.15 |
| Steam inlet/outlet | A (mm) | B (mm) | C (mm) | D (mm) | F drain | G vent | H (mm) | J (mm) | Weight (kg) | Volume (L) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 inch | 135 | 158 | 287 | 88.9 | 1 inch | 1/2 inch | 23 | 215 | 3.0 | 1.2 |
| 3/4 inch | 160 | 177 | 370 | 114.3 | 23 | 290 | 5.0 | 2.5 | ||
| 1 inch | 160 | 177 | 370 | 114.3 | 23 | 290 | 5.0 | 2.5 | ||
| 1-1/2 inch | 195 | 210 | 482 | 141.3 | 27 | 400 | 9.2 | 5.5 | ||
| 2 inch | 195 | 210 | 532 | 141.3 | 27 | 450 | 10.0 | 6.3 |
For full details see the Installation and Maintenance Instructions (IM-P023-60) supplied with the product.
Installation note: The CS10-1 is designed for installation in horizontal lines. Check the arrow for correct orientation.
Note: Handle the body and internals carefully to ensure that the surface finishes are not damaged.
Example: 1 off 2 inch Spirax Sarco CS10-1 stainless steel clean steam separator with removable baffle plate, sanitary clamp connections to ASME BPE, internal surface finish of 0.5 µm complete with material certification to EN 10204 3.1.
| Available spare | Part number |
|---|---|
| Seal | 3 |
| Clamp | 4 |
Always order spares using the description in the Available spares column and state the size and type of separator.
Example: 1 off seal for a Spirax Sarco 1-1/2 inch CS10-1 stainless steel clean steam separator.
SRV66 is a self-draining 316L sanitary pressure reducing valve for clean steam, water and inert gas duties where hygienic pipework needs local downstream pressure control without an external sensing line.
Spirax Sarco FTS14 ball float steam traps provide continuous condensate drainage at steam temperature with integral air venting for stainless steel and hygienic steam duties.
Spirax Sarco CSF16 steam filters help remove contaminant particles from clean steam lines where steam quality, product contact and hygienic hardware protection matter.
BTM7 is a maintainable 316L thermostatic clean steam trap for hygienic condensate drainage where self-draining geometry and near-saturation discharge are required.
| Document | Reference | Language | Download |
|---|---|---|---|
| CS10-1 Stainless Steel Clean Steam Separator | TI-P023-59-EN | English | Download |
Dry steam quality usually depends on the wider clean steam chain, from generation and condensate management through to filtration and point-of-use control.
Return to the wider clean steam range when dryness improvement is only one part of a broader hygienic steam selection project.
Use clean steam generators when the application also depends on producing dedicated clean steam from purified or deionised water before downstream separation.
Add steam filtration when dryness control also needs particulate reduction before hygienic point-of-use duties.
