# Turned Components for Valve & Tap Manufacturing – Application Case > Typical valve components from Swiss turning: valve seats, spindels, cutting rings and fittings in 316, brass and Monel 400. Batches 1,000–50,000 pcs, DIN ISO 2768-mK, EN 10204 3.1. https://www.sinbo-machining.com/case/valve-components --- ## On This Page - Typical component families - Typical supply parameters - Industry scenario: high-volume precision seats, spindles and fittings - Typical component families and processes - Workflow: drawing, sample approval and recurring series - Quality and documentation - FAQ - Related Materials · Related Services · Related Case Studies - Planning components like these? # Turned Components for Valve & Tap Manufacturing Typical valve components from Swiss turning: valve seats, spindels, cutting rings and fittings in 316, brass and Monel 400. Batches 1,000–50,000 pcs, DIN ISO 2768-mK, EN 10204 3.1. Application at a glance ### Typical component families | Valve seats / cartridge cores | 316, brass, Swiss-turned | Valve spindels | 303/416, Monel 400, ground | Cutting rings, fittings | 316, brass, Swiss-turned ### Typical supply parameters | Batch range | 1,000–50,000 pcs per family | Tolerance scheme | DIN ISO 2768-mK, drawing-specified fits | Documentation | EN 10204 3.1, RoHS/REACH ## Industry scenario: high-volume precision seats, spindles and fittings Valve and tap manufacturers combine two sourcing patterns: complex multi-attrit valve bodies in small-to-medium batches, and high-volume precision internals — seats, spindles, balls, cutting rings and fittings — where Swiss-type turning with tight, repeatable tolerances decides cost and quality. Materials span free-machining stainless 303, corrosion-resistant 316/1.4404, brass and specialty alloys such as Monel 400 for aggressive media. Components for pressure-bearing assemblies additionally need clean machining, reliable thread quality and full material traceability. ## Typical component families and processes | Component (DE / EN) | Typical material | Process | Typical batch | Ventilkörper (valve bodies) | 316/1.4404, brass | 3–5 axis milling + turning | 200–5,000 pcs | Ventilsitze / Kartuschenkerne (valve seats, cartridge cores) | 316, brass | Swiss-type turning | 1,000–50,000 pcs | Ventilspindeln (valve spindles) | 303/416, Monel 400 | Swiss turning + centerless grinding | 1,000–20,000 pcs | Kugeln (balls) | 316 | turning + grinding | 2,000–50,000 pcs | Schneidringe (cutting rings) | 316, brass | Swiss-type turning | 5,000–50,000 pcs | Verschraubungen / Nippel (screwed fittings, nipples) | brass, 316 | Swiss-type turning | 2,000–50,000 pcs drawing-standard designations follow common valve-industry drawing practice. ## Workflow: drawing, sample approval and recurring series The standard flow: drawing review and quotation within 48 hours, first samples in 7–15 days, first article inspection and approval, then series production against the approved reference. Batch sizes follow the table above — from single spare parts to tens of thousands of pieces per order, depending on the component family. For repeat orders, tooling, program revisions and inspection records are kept on file, so call-offs remain consistent with the approved first article. Engineering changes — material substitutions, tolerance updates, packaging changes — are handled as controlled changes against the same records. ## Quality and documentation DIN ISO 2768-mK applies as the default tolerance scheme for unspecified dimensions. EN 10204 3.1 inspection certificates are standard for metallic parts, First Article Inspection supports the approval step, and RoHS/REACH declarations are available where required. Surface treatment, cleanliness and packaging requirements are confirmed per drawing. ## FAQ Can you hold seat-to-bore concentricity on valve seats?Yes — Swiss-type turning with the part finished in one clamping keeps seat-to-bore relationships tight; exact values are confirmed per drawing. Do you machine Monel 400 valve spindles?Yes. Monel is part of our standard stainless/specialty alloy portfolio, together with 303/416 free-machining grades. What volumes fit your Swiss turning lines?Component families in this vertical typically run 1,000–50,000 pieces per order with recurring call-offs. Which certificates come with pressure-bearing components?EN 10204 3.1 inspection certificates are standard; pressure testing and additional documentation are confirmed per drawing. ### Related Materials · Related Services · Related Case Studies [Related Materials: Stainless Steel ](https://www.sinbo-machining.com/products/materials/stainless-steel/)[· Copper ](https://www.sinbo-machining.com/products/materials/copper/)[Related Services: Cnc Machining ](https://www.sinbo-machining.com/services/cnc-machining)[Related Case Studies: Kr Shipbuilding Valves ](https://www.sinbo-machining.com/case/kr-shipbuilding-valves/)[· Ev Solenoid Valve ](https://www.sinbo-machining.com/case/ev-solenoid-valve/)This page describes a representative application scenario for the valve and tap manufacturing industry, compiled from typical requirements of this vertical. It is not tied to any specific customer or order; series quantities, materials and tolerances are confirmed per drawing for each enquiry. ## Planning components like these? Send your drawing — Sinbo Precision will review material, tolerance scheme and batch plan and return a quotation within 48 hours. Samples in 7–15 days. [Get a Quote in 48 Hours ](https://www.sinbo-machining.com/quote)