What gasket materials are compatible with the Stainless Steel SWS Welding Nut SMS End for different temperature ranges?

Stainless Steel SWS Welding Nut SMS End — gasket compatibility by temperature ranges: - Up to ~100°C: EPDM (ethylene propylene diene monomer) — excellent for hot water, steam-in-place, and many food products; good chemical resistance and elasticity. - −40°C to ~120°C: NBR / Buna‑N (nitrile) — suitable for oils, fats and many general-purpose food applications; limited high‑temperature resistance compared to EPDM. - −30°C to ~200°C: FKM / Viton — for higher temperatures and aggressive media (oils, hydrocarbons); excellent chemical and heat resistance, but check food-grade certification. - −40°C to ~200°C (food-grade options): PTFE (Teflon) — very broad chemical compatibility and high temperature resistance; ideal where inertness and cleanability are critical; requires proper gland design for sealing. - −60°C to ~300°C: Silicone — good for extreme cold and moderate high temperatures, excellent flexibility and food-grade options available; weaker against oils and aggressive chemicals. Notes: Always verify gasket food-grade certifications (e.g., FDA, EU 1935/2004) and compatibility with specific media. Select gasket hardness and design appropriate for the Stainless Steel SWS Welding Nut SMS End clamping profile and working pressure (up to 15 bar). For critical or high‑temperature applications consult manufacturer recommendations.

What are the recommended cleaning and sterilization methods for the Stainless Steel SWS Welding Nut SMS End to maintain its Ra 0.8 µm surface finish and food-grade hygiene?

Stainless Steel SWS Welding Nut SMS End — recommended cleaning and sterilization: - Pre-rinse: Immediately flush with warm (30–40 °C) potable water to remove loose solids and residues. - Alkaline wash: Circulate a food-grade alkaline detergent solution (pH 10–12) at 40–60 °C for 5–20 minutes to remove fats and proteins. Use flow rates and turbulence sufficient to create shear on the Ra 0.8 µm surface. - Intermediate rinse: Thoroughly rinse with potable water until detergent is fully removed. - Acid passivation (periodic): Use a mild food-grade acid rinse (citric or nitric, per supplier guidance) to passivate the stainless steel and remove mineral deposits; typically 1–5% solution at ambient to 40 °C for 5–15 minutes. Rinse thoroughly after. - Sterilization: For food-grade hygiene, use one of: - Hot-water/steam sterilization: 80–121 °C (per gasket compatibility) for required exposure time (e.g., 15–30 min for 121 °C steam) to achieve thermal sterilization. - Chemical sanitizers: Use approved food-grade sanitizers (e.g., peracetic acid, hypochlorite at recommended concentrations) ensuring contact time and concentrations per manufacturer and gasket limits. Rinse if required. - Mechanical cleaning: For weld areas, use non-abrasive brushes or CIP spray balls; avoid abrasive tools that can increase surface roughness above Ra 0.8 µm. - Handling and drying: After final rinse or sterilization, drain, air-dry or use filtered compressed air to prevent recontamination. Inspect for residues and corrosion. - Compatibility checks: Verify detergent, acid, sanitizer and temperature compatibility with the Stainless Steel SWS Welding Nut SMS End gasket material and process limits to avoid damage. - Validation & monitoring: Regularly measure surface roughness and perform microbiological swabs or ATP tests to confirm maintained Ra 0.8 µm and hygienic condition. Keep records for quality control.

A fitting SMS for a nut for welding-on, steel stainless, type SWS

All products, Hygienic stainless steel couplings/

Additional information

Material	SS – stainless steel

A fitting SMS for a nut, with spigot for welding-on, Ra (in the bore) 0.8 µm, for use in industry food. maximum The permissible pressure working (for the same coupling): 15 bar. Operating temperature: depending on kinds material used the gasket. Material: steel stainless.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
NH-SWS-025	Fitting SMS for welding-on DN25	-	15	In stock	Enquiry
NH-SWS-038	Fitting SMS for welding-on DN38	-	15	In stock	Enquiry
NH-SWS-050	Fitting SMS for welding-on DN50	-	15	In stock	Enquiry
NH-SWS-063	Fitting SMS for welding-on DN63	-	15	In stock	Enquiry
NH-SWS-075	Fitting SMS for welding-on DN75	-	15	In stock	Enquiry
NH-SWS-100	Fitting SMS for welding-on DN100	-	15	In stock	Enquiry

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A fitting SMS for a nut, with spigot for welding-on, Ra (in the bore) 0.8 µm, for use in industry food. maximum The permissible pressure working (for the same coupling): 15 bar. Operating temperature: depending on kinds material used the gasket. Material: steel stainless.