Name: Spirax Sarco S13 Steam Separator | Flanged SG Iron
Brand: Spirax Sarco Inc.

S13

S13 SG Iron Separator (Flanged)

Flanged SG iron baffle-type separator for removing entrained liquid from steam, compressed-air and gas systems, in DN40 to DN200 sizes.

The Spirax Sarco S13 is a flanged SG iron baffle-type steam separator for removing entrained liquid from steam, compressed-air and gas systems. Covering DN40 to DN200 with multiple flange standards, it combines a dedicated drain connection with an accessible inspection plug for dependable moisture removal. Compare the wider Spirax Sarco steam separator range when selecting materials, pressure ratings or connection types for other duties.

For effective drainage, install the S13 horizontally with the drain directly below and follow the appropriate steam-trap selection route for the drain set. Suitable pipeline strainers and filters can help protect downstream drainage equipment where solid contamination is present, while drier steam supports more predictable operation across the pressure-reducing valve range and other process equipment.

Description

The S13 separator is an SG iron baffle-type separator used for the removal of entrained liquids in steam, compressed-air or gas systems. Fitting insulation jackets increases separator performance.

Standards

This product fully complies with the requirements of the EU Pressure Equipment Directive and the UK Pressure Equipment (Safety) Regulations, and is designed in accordance with ASME B31.3.

Certification

This product is available with a manufacturer's Typical Test Report. All certification and inspection requirements must be stated when the order is placed.

Sectional view of the Spirax Sarco S13 flanged SG iron separator — S13 construction: body, inspection plug, gasket and drain reducing bush.

Sizes and pipe connections

DN40, DN50, DN65, DN80, DN100, DN125, DN150 and DN200 (1½, 2, 2½, 3, 4, 5, 6 and 8 inches).
Flanged EN 1092 PN16 and PN25 with screwed BSP drain.
Flanged JIS/KS 10K with screwed BSP drain.
Flanged JIS/KS 20K with screwed BSP drain for DN40, DN50, DN65 and DN200 only.
Flanged ASME 125/150 with screwed NPT drain.

Materials

No.	Part	Material	Specification
1	Body	SG iron	BS EN 1563 / EN-JS1030 / A395
2	Plug	Carbon steel	1.0460 (C22.8) / A105N
3	Gasket	Reinforced exfoliated graphite	—
4	Drain reducing bush	Forged carbon steel	ASTM A105

Pressure and temperature limits

S13 pressure and temperature operating limits chart — ISO 6552 pressure and temperature limits. The shaded area is prohibited.

Condition	Connection rating	Limit
PMA — maximum allowable pressure	JIS/KS 10K	14 bar g at 120 °C (203 psi g at 248 °F)
	PN16	16 bar g at 120 °C (232 psi g at 248 °F)
	PN25 and JIS/KS 20K	25 bar g at 120 °C (363 psi g at 248 °F)
	ASME 125	13.8 bar g at 65 °C (200 psi g at 149 °F)
	ASME 150	17.2 bar g at 38 °C (250 psi g at 100 °F)
TMA — maximum allowable temperature	JIS/KS 10K	300 °C at 10 bar g (572 °F at 145 psi g)
	PN16	350 °C at 11.2 bar g (662 °F at 162 psi g)
	PN25 and JIS/KS 20K	350 °C at 17.5 bar g (662 °F at 254 psi g)
	ASME 125	232 °C at 8.6 bar g (450 °F at 125 psi g)
	ASME 150	343 °C at 8.6 bar g (650 °F at 125 psi g)
Minimum allowable temperature	All ratings	−10 °C (14 °F)
PMO — maximum operating pressure for saturated steam	JIS/KS 10K	12.3 bar g (178 psi g)
	PN16	13.7 bar g (198 psi g)
	PN25 and JIS/KS 20K	21.3 bar g (309 psi g)
	ASME 125	10.1 bar g (146 psi g)
	ASME 150	13.9 bar g (202 psi g)
TMO — maximum operating temperature	JIS/KS 10K	300 °C at 10 bar g (572 °F at 145 psi g)
	PN16	350 °C at 11.2 bar g (662 °F at 162 psi g)
	PN25 and JIS/KS 20K	350 °C at 17.5 bar g (662 °F at 254 psi g)
	ASME 125	232 °C at 8.6 bar g (450 °F at 125 psi g)
	ASME 150	343 °C at 8.6 bar g (650 °F at 125 psi g)
Minimum operating temperature	All ratings	−10 °C (14 °F). Consult Spirax Sarco for lower temperatures.
Maximum cold hydraulic test pressure	JIS/KS 10K	20.4 bar g (296 psi g)
	PN16	24.0 bar g (348 psi g)
	PN25 and JIS/KS 20K	37.5 bar g (544 psi g)
	ASME 125	20.7 bar g (300 psi g)
	ASME 150	25.8 bar g (374 psi g)

Important: An S13 may be supplied with a lower pressure rating than that cast into the body. Use the operating chart for the actual product limitation.

Dimensions, weight and volume

S13 separator dimensional drawing — Dimensions A–G, inspection opening and drain connection.

Metric dimensions

Size	A mm	B mm	C mm	D mm	E mm	F mm	G mm	Weight kg	Volume L
DN40 / 1½	111	156	89	365	12.7	25.4	94	14	1.6
DN50 / 2	146	205	117	456	12.7	25.4	98	25	3.2
DN65 / 2½	178	249	146	406	19.0	38.1	98	28	4.6
DN80 / 3	178	252	152	483	19.0	38.1	98	36	6.5
DN100 / 4	223	315	197	692	25.4	38.1	118	60	13.5
DN125 / 5	226	397	381	706	25.4	38.1	121	128	38.5
DN150 / 6	226	397	381	706	25.4	38.1	121	130	42.5
DN200 / 8	308	502	426	762	38.1	38.1	140	190	68.0

Imperial dimensions

Size	A in	B in	C in	D in	E	F	G in	Weight lb	Volume gal
DN40 / 1½	4.37	6.14	3.50	14.4	½	1	3.70	30.9	0.42
DN50 / 2	5.75	8.07	4.61	18.0	½	1	3.86	55.1	0.84
DN65 / 2½	7.00	9.80	5.75	16.0	¾	1½	3.86	61.7	1.21
DN80 / 3	7.00	9.92	5.98	19.0	¾	1½	3.86	79.4	1.72
DN100 / 4	8.78	12.4	7.76	27.2	1	1½	4.64	132.3	3.57
DN125 / 5	8.90	15.6	15.0	27.8	1	1½	4.76	282.2	10.2
DN150 / 6	8.90	15.6	15.0	27.8	1	1½	4.76	286.6	11.2
DN200 / 8	12.1	19.8	16.8	30.0	1½	1½	5.51	418.9	18.0

Recommended tightening torques

Inspection plug item	Sizes	Spanner	Thread	Torque
2	DN40–DN65	46 A/F	M56	150–165 N m (110–121 lbf ft)
2	DN80–DN200	60 A/F	M72	190–210 N m (140–155 lbf ft)

Safety, installation and maintenance

For full details, see Installation and Maintenance Instructions IM-P023-55 supplied with the product.

Installation: Install the separator in a horizontal pipeline with the drain directly below. Connect a suitable liquid drainer or steam trap to drain connection E so separated liquid is removed quickly.

Disposal: The product is recyclable. No ecological hazard is anticipated when it is disposed of with due care.

Ordering example: One DN50 Spirax Sarco S13 separator with SG iron body and flanged EN 1092 PN16 connections.

Installation and Maintenance Instructions for Spirax Sarco baffle-type separators.

1. Safety information

Safe operation can only be guaranteed when these products are correctly installed, commissioned, used and maintained by qualified personnel in accordance with the operating instructions. General safety instructions for pipeline and plant construction, and the correct use of tools and safety equipment, must also be followed.

Warning: The inspection-plug gasket on the S2, S3, S12 and S13, and the bottom-cover gasket on the S5 and S6, contain a thin stainless-steel support ring that can cause injury if it is not handled and disposed of carefully.

1.1 Intended use

Check the Installation and Maintenance Instructions, nameplate and Technical Information Sheet to confirm that the product is suitable for the intended application. The products are designed for steam and compressed air in Group 2 of the Pressure Equipment Directive.

Product	Pressure rating	Size range	Group 2 gases	Group 2 liquids
S1	16 bar g	DN15–DN20 / DN25 / DN32–DN40	SEP / 1 / SEP	SEP
S2	16 bar g	DN32–DN40 / DN50	SEP / 1	SEP
S3	16 bar g	DN40 / DN50–DN80 / DN100–DN150 / DN200	SEP / 1 / 2 / 1	SEP
S5 and S6	50 bar g	DN15 / DN20–DN25 / DN32–DN50	SEP / 1 / 2	SEP
S7 and S8	14, 20, 23 or 25 bar g	DN65–DN350, category varies with rating and size	SEP–4	SEP
S12	25 bar g	DN32–DN40 / DN50	SEP / 1	SEP
S13	25 bar g	DN40 / DN50–DN80 / DN100–DN125 / DN150–DN200	SEP / 1 / 2 / 2	SEP

Check material suitability, pressure and temperature limits. Fit a safety device if failure could create dangerous overpressure or overtemperature.
Any flange modification is the responsibility of the organisation performing it and must follow internationally recognised flange standards without compromising the design rating.
Determine the correct installation position and direction of flow.
Minimise external stresses imposed by the connected system.
Remove protective covers and nameplate film before high-temperature service.
Confirm fluid compatibility with the equipment materials before use.

1.2 Access

Provide safe access, a guarded working platform where necessary, and suitable lifting gear.

1.3 Lighting

Provide adequate lighting, especially for detailed work.

1.4 Pipeline contents

Consider flammable or hazardous substances and temperature extremes in the pipeline.

1.5 Surrounding hazards

Consider explosion risk, oxygen deficiency, dangerous gases, hot surfaces, fire, noise and moving machinery.

1.6 The system

Assess the effect of isolation and other work on the complete system, controls, alarms and protective devices.

1.7 Pressure systems

Isolate and safely vent pressure. Consider double isolation and lock or label closed valves. A zero gauge reading does not prove depressurisation.

1.8 Temperature

Allow temperature to normalise after isolation to prevent burns.

1.9 Tools

Use suitable tools and consumables and only genuine Spirax Sarco replacement parts.

1.10 Protective clothing

Use protection appropriate to chemical, temperature, radiation, noise, falling-object, eye and face hazards.

1.11 Permits to work

Competent personnel must carry out or supervise work. Follow the permit-to-work system and post warning notices where required.

1.12 Handling

Assess lifting and handling risks for large or heavy products and use an appropriate method.

1.13 Residual hazards

External surfaces may reach 300 °C (572 °F). Many products are not self-draining; take care when removing or dismantling them.

1.14 Freezing

Protect non-self-draining products against frost damage.

1.15 Disposal

The products are recyclable when handled with due care. Check local rules and current Spirax Sarco product-compliance information.

1.16 Returning products

Provide written information and safety data sheets for contamination or damage that may create health, safety or environmental risks.

1.17 Working safely with cast-iron products on steam

Cast iron is brittle. If a cast-iron product is dropped and may be damaged, do not use it unless the manufacturer has inspected and pressure-tested it. Follow good steam-engineering practice to prevent waterhammer and tensile stress.

Steam-main drainage and waterhammer prevention diagrams — Waterhammer prevention and steam-main drainage arrangements.

Pipe alignment and flange bolt tightening guidance — Avoid pipe misalignment and tighten flange bolts gradually across diameters.

Thermal expansion layouts with guides and fixing points — Guides, fixing points, limit rods and permitted lateral movement.

2. General product information

All products covered by this guide are baffle-type separators used to remove entrained liquids from steam, compressed-air and gas systems. Insulation jackets are recommended to improve performance.

Type	Material	Pressure rating	Sizes	Connections	TI reference
S1	SG iron	PN16	½, ¾ and 1 in	Screwed	TI-P023-02
S2	Cast iron	PN16	1¼, 1½ and 2 in	Screwed	TI-P023-07
S3	Cast iron	PN16	DN40–DN200	Flanged	TI-P023-24
S5	Carbon steel	PN50 / ASME 300	DN15–DN50	Screwed and flanged	TI-P023-11
S6	316L austenitic stainless steel	PN50 / ASME 300	DN15–DN50	Screwed and flanged	TI-P023-12
S7	Carbon steel	PN16 and PN40	DN65–DN350	Flanged	TI-P138-03
S8	Austenitic stainless steel	PN16 and PN40	DN65–DN350	Flanged	TI-P138-10
S12	SG iron	PN25	1¼, 1½ and 2 in	Screwed	TI-P023-25
S13	SG iron	PN25	DN40–DN200	Flanged	TI-P023-26

S7 and S8 separators are designed and manufactured in accordance with EN 13445:2002, Unfired Pressure Vessels.

3. Installation

Before installation, follow Section 1. Check body markings, nameplate and Technical Information Sheet. Verify materials and pressure and temperature limits; establish the correct position and flow direction; remove protective covers and nameplate film; and apply insulation where required.

S1, S2, S3, S12 and S13: Install in a horizontal pipeline with the drain directly below. Connect a suitable liquid drainer or steam trap to the drain so separated liquid is removed quickly.

S13 separator installed on a steam line with isolation valve, strainer and float trap — S13 steam-line arrangement with isolation valve, strainer and float trap.

3.5 S5 and S6

Install horizontally with the drain below and connect a suitable liquid drainer or float-type steam trap. If air may collect, connect a suitable air vent; otherwise replace the plastic transit plug with a carbon-steel Class 3000 lb plug.

3.6 S7 and S8

Install horizontally with the drain below. Use the support brackets to minimise piping loads. Connect a suitable liquid drainer or steam trap, preferably a float type. Fit an air vent where air can collect, or install the specified carbon-steel plug.

4. Commissioning

After installation or maintenance, confirm that the system is fully functional and test all alarms and protective devices.

Separator applications in heat-transfer and compressed-air systems — Typical separator applications for heat-transfer process protection and compressed-air distribution.

5. Operation

Separators gather small droplets of entrained liquid and separate them from the gas or vapour flow. The heavier droplets strike the internal baffles, move to the drain connection and leave the system through a steam trap, or through a liquid drainer in air and gas systems.

6. Maintenance

Before maintenance, follow Section 1. S1, S2, S3, S12 and S13 contain no internal components that require routine maintenance.

Warning: Handle the inspection-plug gasket carefully because it contains a thin stainless-steel support ring.

S13 inspection plug and recommended tightening torque table — Inspection plug and torque values for S2, S3, S12 and S13.

Separator	Item	Sizes	Spanner	Thread	Torque
S13	2	DN40–DN65	46 A/F	M56	150–165 N m (110–121 lbf ft)
S13	2	DN80–DN200	60 A/F	M72	190–210 N m (140–155 lbf ft)

7. Spare parts

There are no spare parts required or available for these components.