What is the recommended pressure range for the Rotary head ST-357 with ceramic insert and 20Â° spray angle?

The recommended working pressure range for the Rotary head ST-357 with ceramic insert and 20Â° spray angle is 100â250 bar. The unit (material: brass and plastic) is designed to operate up to +100Â°C.

How should I identify calibration colors on the Rotary head ST-357 with ceramic insert and 20Â° spray angle?

Identify calibration colors by matching the colored marks on the Rotary head ST-357 to the manufacturer's calibration chart or label. Each color corresponds to a specific flow/nozzle setting for the 20Â° ceramic insert; check the headâs colored dot or ring against the supplied documentation or stencil that came with the unit. If documentation is unavailable, record spray pattern and flow at a reference pressure (within 100â250 bar) for each color, then label those measured values for future use. Ensure components are cool (â¤100Â°C) and handle brass/plastic parts carefully when removing/inserting the ceramic insert.

Can the Rotary head ST-357 with ceramic insert and 20Â° spray angle be used with fluids above +100Â°C?

No. Reasoning: The Rotary head ST-357 with ceramic insert, spray angle 20Â°, is specified with an operating temperature up to +100Â°C. Using it with fluids hotter than +100Â°C would exceed the documented temperature limit and therefore is not recommended. Exceeding the maximum operating temperature can compromise materials (brass and plastic components), degrade seals and plastics, alter clearances or tolerances, increase wear of moving parts, change spray characteristics, and create safety risks (leakage, failure, or loss of calibration). If you must spray fluids above +100Â°C, consider alternatives: select a rotary head specified for higher temperatures, use materials rated for the elevated temperature (e.g., high-temperature alloys, high-performance polymers or elastomers), consult the manufacturer for a high-temperature version or special modifications, and validate performance and safety through testing. Always follow manufacturer specifications and safety guidelines.

Rotary head ST-357

All products, Guns for high-pressure washers/

Additional information

ST-357 rotary head with ceramic insert, spray angle 20°. Marked with different colors for calibration identification. Material: brass and plastic. Working pressure: 100 – 250 bar. Operating temperature: up to +100°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
RM-200357510	Rotary head, GW 1/4" BSP, WP=100-250 bar, caliber 10	-	250	In stock	Enquiry
RM-200357530	Rotary head, GW 1/4" BSP, WP=100-250 bar, cal. 03	-	250	In stock	Enquiry
RM-200357535	Rotary head, GW 1/4" BSP, WP=100-250 bar, cal. 035	-	250	In stock	Enquiry
RM-200357540	Rotary head, GW 1/4" BSP, WP=100-250 bar, cal. 04	-	250	In stock	Enquiry
RM-200357545	Rotary head, GW 1/4" BSP, WP=100-250 bar, cal. 045	-	250	In stock	Enquiry
RM-200357550	Rotary head GW 1/4" BSP, WP=100-250 bar, cal.050	-	250	In stock	Enquiry
RM-200357555	Rotary head, GW 1/4" BSP, WP=100/250 bar, cal. 055	-	250	In stock	Enquiry
RM-200357560	Rotary head, GW 1/4" BSP, WP=100-250 bar, cal. 06	-	250	In stock	Enquiry
RM-200357565	Rotary head, GW 1/4" BSP, WP=100-250 bar, cal. 065	-	250	In stock	Enquiry
RM-200357570	Rotary head, GW 1/4" BSP, WP=100-250 bar, cal. 07	-	250	In stock	Enquiry
RM-200357580	Rotary head, GW 1/4" BSP, WP=100-250 bar, cal. 08	-	250	In stock	Enquiry

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ST-357 rotary head with ceramic insert, spray angle 20°. Marked with different colors for calibration identification. Material: brass and plastic. Working pressure: 100 – 250 bar. Operating temperature: up to +100°C.