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Application Guide

Hygienic Valves for Food & Beverage Processing

Food, dairy, brewery, and beverage processing requires hygienic valves that comply with food safety regulations, withstand rigorous CIP (Clean-in-Place) and SIP (Steam-in-Place) cycles, and are designed to prevent microbial contamination of product. 3-A Sanitary Standards, EHEDG (European Hygienic Engineering and Design Group), and FDA 21 CFR compliance are the benchmark requirements. Surface finish, dead-leg elimination, and elastomer compatibility are critical design factors.

3-A Sanitary Standards (USA)EHEDG (European Hygienic Engineering & Design Group)FDA 21 CFR 177 (Plastics)FDA 21 CFR 178 (Adjuvants)USP Class VIFSSAI (Food Safety and Standards Authority of India)EN 1672-2 (Hygiene requirements for food machinery)ISO 9001:2015
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Recommended Valve Types for Hygienic Food & Beverage Processing

Sanitary Butterfly Valve

PN 10 / PN 16

Why: Standard isolation valve on dairy, brewery, and beverage process lines — 3-A or EHEDG certified, CIP-compatible

Materials: SS 316L body and disc, EPDM or silicone seat — electropolished, Ra ≤0.8μm

Standards: 3-A Sanitary, EHEDG, EN 593, FDA

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Weir-Type Diaphragm Valve

PN 10 / PN 16

Why: Zero dead-leg, full CIP/SIP capability — standard valve for sterile dairy, bioprocess, and aseptic beverage lines

Materials: SS 316L body (Ra ≤0.8μm), EPDM diaphragm (steam CIP), PTFE-faced EPDM for acid CIP

Standards: 3-A Sanitary, EHEDG, ISO 16138, FDA

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Sanitary Ball Valve (Full Bore)

PN 16 / PN 40

Why: Full-bore CIP/SIP isolation for high-viscosity products (syrups, concentrates, edible oils) and high-pressure service

Materials: SS 316L body, ball, and seats — electropolished, EPDM or PTFE stem seal

Standards: 3-A Sanitary, FDA 21 CFR, ISO 16137

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Mix-Proof (Double-Seat) Valve

PN 10 / PN 16

Why: Prevents cross-contamination between two fluids (product and CIP) by maintaining a leaked-to-atmosphere cavity between the two independent seats

Materials: SS 316L, EPDM seats, electropolished — only pneumatically actuated

Standards: 3-A Sanitary 85-03, EHEDG Type EL Aseptic D

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Critical Requirements

SS 316L minimum for all product-contact surfaces — low carbon content prevents sensitisation
Internal surface finish Ra ≤0.8μm (ID) for product-contact surfaces, Ra ≤0.4μm for sterile and WFI applications
3-A Sanitary Standards or EHEDG certification — proof of cleanability and hygienic design
CIP compatibility: valves must withstand NaOH (0.5–2%), HNO₃ (0.5–1.5%), and peracetic acid (PAA, 0.1–0.3%) at 70–85°C
SIP capability: selected valves must withstand steam at 121–134°C for sterilisation cycles
Zero dead-leg design: dead-leg length ≤2 × internal pipe diameter per ISPE Baseline Guide
USP Class VI / FDA 21 CFR compliant elastomers: EPDM, silicone, or PTFE for product-contact seals
Drainability: valve and piping design must be fully self-draining to prevent product pooling

Fluid & Service Challenges

⚠Pasteurised milk and cream (pH 6.5, 4°C to 72°C) — SS 316L, EPDM seats, Ra ≤0.8μm
⚠CIP chemicals (strong NaOH, HNO₃, PAA) — chemical resistance of elastomers critical; EPDM for alkaline, PTFE for acid
⚠High-sugar syrups (Brix 65–75) — full-bore, self-draining valves prevent crystallisation and sugar build-up
⚠Beer and fermented beverages (CO₂-pressured, pH 3.5–4.5) — SS 316L body, EPDM seats resist carbonated low-pH products
⚠Edible oils (high viscosity, up to 60°C) — full-bore ball valves or butterfly valves with easy manual operation

Material Selection Guidance

For all food and beverage product-contact surfaces: SS 316L is the minimum specification. SS 304 is not recommended for product-contact surfaces in dairy and beverage due to inferior corrosion resistance to CIP chemicals and chloride-containing products. Elastomers: EPDM (steam, hot water, alkaline CIP, dairy and beverage — USP Class VI and FDA listed); silicone (neutral media, broad food contact compliance — check USP Class VI); PTFE (acid CIP, wine, vinegar, juice — maximum chemical resistance). Natural rubber and NBR must not be used for food-contact applications. All product-contact surfaces require material certificates (EN 10204 3.1) and food-contact compliance certificates (FDA 21 CFR or EU 10/2011).

Typical Service Points

Dairy processing (milk, cream, cheese, yoghurt, UHT)
Brewery and fermentation (beer, wine, spirits)
Juice and fruit drink processing (HTST, UHT)
Soft drink and carbonated beverage blending
Edible oil refining and filling
Sugar and confectionery syrup handling
CIP/SIP skid piping for food plants
Aseptic filling lines (Tetra Pak, aseptic pouches)

FAQ — Hygienic Valve Selection for Food & Beverage Processing

What is the difference between 3-A Sanitary Standards and EHEDG for valve selection?
Both 3-A and EHEDG define hygienic design requirements but originate from different regions and have different testing approaches. 3-A Sanitary Standards (USA) require physical cleanability testing (cleaning test with validation) and cover specific equipment types with detailed design criteria. EHEDG (European Hygienic Engineering and Design Group) certifies equipment through a combination of design review and cleanability testing. For equipment sold in the USA, 3-A is typically required; for EU and most international markets, EHEDG is the preferred standard. Both are widely accepted globally, and leading valve manufacturers often hold both certifications.
What surface finish is required for food-grade stainless steel valves?
For most food and beverage applications, the internal product-contact surface finish should be Ra ≤0.8μm (equivalent to 32 micro-inch Ra in US units). For sterile and aseptic applications (UHT, aseptic filling), Ra ≤0.4μm is required. Electropolishing (EP) is preferred for sterile applications as it removes micro-surface defects and reduces surface area for microbial attachment. Mechanical polish to Ra 0.8μm is acceptable for most non-sterile dairy and beverage service. Surface finish certificates (profilometry reports) should be provided with valve documentation.
What valves are used for CIP (Clean-in-Place) systems in food plants?
CIP systems in food plants typically use: mix-proof (double-seat) valves at product-CIP interface points — these prevent cross-contamination during simultaneous product and CIP flow; pneumatically actuated butterfly or diaphragm valves for CIP chemical supply and return isolation; and weir-type diaphragm valves for precise CIP chemical dosing. All CIP valves must be SS 316L, Ra ≤0.8μm internally, with EPDM or PTFE diaphragms/seats rated for CIP temperatures (70–85°C) and chemicals (NaOH, HNO₃, PAA).
Can you supply valves compliant with FSSAI and Indian food safety regulations?
Yes. FSSAI (Food Safety and Standards Authority of India) Regulation 2.1.1 requires that all equipment and materials in contact with food shall be of food-grade materials and shall not impart any toxic substance to food. SS 316L stainless steel with Ra ≤0.8μm surface finish, EPDM and silicone elastomers (FDA 21 CFR / EU 10/2011 listed), and PTFE seats are all compliant with FSSAI material requirements. We can provide material composition certificates, FDA compliance declarations, and EU food contact compliance documentation for all product-contact valve components.

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Hygienic Food & Beverage Processing

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Key Standards

3-A Sanitary Standards (USA)
EHEDG (European Hygienic Engineering & Design Group)
FDA 21 CFR 177 (Plastics)
FDA 21 CFR 178 (Adjuvants)
USP Class VI
FSSAI (Food Safety and Standards Authority of India)
EN 1672-2 (Hygiene requirements for food machinery)
ISO 9001:2015

Products for This Application

Ball ValvesButterfly ValvesDiaphragm Valves

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