Transfer Lines
Reverse-flow protection in hygienic dairy process systems.
Sanitary Valve System
Sanitary Check Valves for Hygienic Reverse-Flow Protection.
Sanitary check valves are specified to help prevent reverse flow in hygienic transfer lines, utility lines and process systems.
304 / 316LTri-ClampSpring / DiscFood & DairyRFQ Ready
Applications
Used where flow direction control matters.
Check valves support hygienic systems where backflow prevention and process reliability are important.
Utility and Product Lines
Commonly requested for transfer and cleaning circuits.
Process Support
Used in beverage process lines and packaged product facilities.
Sizes & Dimensions
Standard sanitary check valve sizes.
Spring-loaded and gravity-operated designs for vertical and horizontal lines. Tri-clamp ends standard.
| Nominal | DN | OD (mm) | Tri-Clamp (mm) | Cracking Pressure | Cv | Type |
|---|---|---|---|---|---|---|
| ½" | DN15 | 12.7 | 50.5 | 0.07 bar | 6 | Spring |
| ¾" | DN20 | 19.05 | 50.5 | 0.07 bar | 12 | Spring |
| 1" | DN25 | 25.4 | 50.5 | 0.07 bar | 22 | Spring |
| 1½" | DN40 | 38.1 | 64.0 | 0.07 bar | 48 | Spring |
| 2" | DN50 | 50.8 | 77.5 | 0.07 bar | 85 | Spring/Disc |
| 2½" | DN65 | 63.5 | 91.0 | 0.07 bar | 140 | Spring/Disc |
| 3" | DN80 | 76.2 | 91.0 | 0.07 bar | 210 | Disc |
| 4" | DN100 | 101.6 | 119.0 | 0.07 bar | 380 | Disc |
Operating Conditions
Pressure-temperature rating for check valves.
Soft-seat materials provide bubble-tight shutoff across temperature range. Spring force determines cracking pressure.
Service Conditions
- Standard EPDM: –40°C to +130°C, max 10 bar
- Viton (FKM): –20°C to +200°C, max 10 bar
- Cracking pressure: 0.07 bar (1 psi) standard
- Reverse leak rate: Zero (bubble-tight)
- Installation: Vertical (up-flow) or horizontal
- Documentation: MTR / 3.1 cert by RFQ
Actual ratings depend on size, material and operating conditions. Confirm via RFQ for project-specific requirements.
Standards & Compliance
Built to recognized sanitary and pressure standards.
Full documentation packages available including MTR, 3.1 certificates, surface roughness reports and pressure test records.
3-A 74-07
3-A Sanitary Standard
Sanitary equipment for milk and milk products processing.
ASME BPE
Bioprocessing Equipment
Surface finish, materials and design for pharma/biotech.
EHEDG
Hygienic Equipment Design
European hygienic engineering and design certification.
FDA 21 CFR
FDA 21 CFR 177
Food contact materials compliance for seats and seals.
ASTM A276
Stainless Steel Bar
Material specification for 304/316L bodies.
DIN 32676
Tri-Clamp Connections
Dimensional standard for tri-clamp fittings.
EC 1935/2004
Food Contact
EU regulation on food-contact materials.
Product Variants
Check Valve configurations for different process roles.
Multiple variants available to match your application requirements. Browse related products for complete process line coverage.
Spring Check Valves
Spring-loaded poppet for any orientation. Bubble-tight shutoff with low cracking pressure.
Request quote →Disc Check Valves
Gravity disc for vertical installations. Ideal for larger sizes and CIP-return lines.
Request quote →Ball Check Valves
Free-floating ball seals on reverse flow. Best for high-viscosity and particulate media.
Request quote →Inline Check Valves
Compact wafer-style fits between tri-clamps for minimal installation space.
Request quote →Materials & Standards
Sanitary check valve sourcing language.
Specify valve style, connection, material grade, spring/seal and documentation requirements.
304 / 316L
Common stainless grades for sanitary check valve sourcing.
Tri-Clamp / Weld
Connection style should be defined in the RFQ.
MTR / QC by RFQ
Material traceability and inspection requirements by request.
Technical Overview
Typical sanitary check valve RFQ fields.
Cracking pressure and compatibility should be reviewed by supplier for the application.
| Requirement | Typical Information Needed |
|---|---|
| Valve Type | Sanitary stainless steel check valve |
| Material Grade | 304 / 316L stainless steel |
| Connection Type | Tri-clamp or weld end by RFQ |
| Internal Style | Spring, disc or project-specific style by RFQ |
| Service Conditions | Media, flow direction and cleaning method |
| Documentation | MTR/MTC and inspection requirements by RFQ |
Engineering RFQ
Prepare a check valve RFQ package.
Include valve size, connection, material grade, service media, flow direction, quantity and documentation needs.
- Upload drawing or BOM where available
- Include target quantity and lead time
- State material grade and finish expectations
- Include cleaning/service conditions if known
Procurement Support
Built for contractor and plant buyer workflows.
Use this page to prepare a clear sourcing request for repeat components, project packages, secondary supplier comparisons or plant maintenance requirements.
Common Questions
Frequently asked questions about check valves.
Engineering and procurement questions we hear most often. For project-specific guidance, send your application details via RFQ.
Where should check valves be installed?
Install downstream of pumps to prevent backflow during shutdown, at tank outlets to prevent siphoning, and in CIP return lines to prevent contamination.
Allow minimum 5× pipe diameter of straight pipe upstream and 2× downstream for proper flow patterns. Avoid turbulent conditions immediately upstream.
What is cracking pressure?
Cracking pressure is the minimum differential pressure required to open the valve. Standard sanitary check valves crack at approximately 0.07 bar (1 psi).
Low cracking pressure means minimal flow restriction. For gravity-fed lines or low-pressure applications, this is critical.
Can check valves be installed in any orientation?
Spring check valves work in any orientation. Gravity disc check valves are typically vertical up-flow only.
For uncertain orientation requirements, specify spring check valves to ensure reliable operation in all positions.
How do I prevent water hammer?
Use spring-loaded check valves which close quickly before reverse flow develops momentum. Soft-seat designs absorb closing energy better than metal seats.
For severe water hammer concerns, install slow-acting (cushioned) check valves or pulse dampeners. Provide pump flow rate and pipe length for evaluation.
What is the difference between bubble-tight and leak-tight?
Bubble-tight (zero leakage) is the standard for sanitary check valves with elastomer seats. Leak-tight allows minor seepage per API 6D Class V/VI.
For sanitary, dairy and pharmaceutical service, always specify bubble-tight (zero leak) per 3-A standards.
How are check valves cleaned during CIP?
Spring check valves clean well because flow opens the poppet exposing all surfaces. Gravity disc valves may benefit from manual cycle assistance during CIP.
For SIP cycles, ensure cycle pressure exceeds cracking pressure to open the valve and allow steam contact with all internal surfaces.
What documentation is included?
Standard package: 3.1 MTR for body, FDA compliance for seat elastomer, pressure/leak test certificates. Optional: ASME BPE surface finish reports, ATEX certifications.
For pharmaceutical service, request full BPE documentation. For oxygen service, specify oxygen-cleaned and certified.
Technical Documentation & RFQ Preparation
Use structured technical information to prepare clearer RFQs, reduce revision cycles and align sourcing requirements before quotation.
Common Documentation Requests
MTR / MTC Certificates
Material traceability and stainless grade verification documentation.
Surface Finish Notes
Sanitary finish expectations and application-specific finish references.
Dimensional Drawings
Outline dimensions, connection geometry and installation references.
Recommended RFQ Inputs
Application Details
Media, cleaning method, temperature, pressure and process environment.
Quantity & Delivery
Target quantity, delivery timing and repeat-order expectations.
Documentation Expectations
Inspection, certificates, traceability and quality-control requirements.
Have a sanitary check valve requirement?
Send valve size, connection, flow direction, media, quantity and target delivery needs.
Engineering Documentation
Technical Datasheet Available
Download the product datasheet for technical specifications, dimensional references, material data, applicable standards and RFQ guidance. Suitable for procurement, engineering review and project documentation.