High-Purity Lines
Isolation and control where cleanability and documentation matter.
Sanitary Valve System
Sanitary Diaphragm Valves for High-Purity Process Control.
Diaphragm valves are specified for hygienic and high-purity applications where cleanability, isolation and documentation requirements are important.
316LHigh-PurityManual / PneumaticASME BPE LanguageRFQ Ready
Applications
Specified for controlled hygienic and high-purity service.
Diaphragm valves are often used in pharmaceutical, biotech, clean utility and sensitive hygienic process environments.
Skid Systems
Commonly requested for process skids and clean utility connections.
Sensitive Process Points
Used where hygienic design and product isolation are important.
Sizes & Dimensions
Standard sanitary diaphragm valve sizes.
Forged and machined bodies in DN8 through DN100. Two-port and tank-bottom configurations with full-bore drainability.
| Nominal | DN | OD (mm) | Face-to-Face | Cv | Body Style | Weight (kg) |
|---|---|---|---|---|---|---|
| ¼" | DN8 | 12.7 | 70 | 4 | Forged | 0.4 |
| ½" | DN15 | 12.7 | 70 | 8 | Forged | 0.6 |
| ¾" | DN20 | 19.05 | 90 | 14 | Forged | 0.9 |
| 1" | DN25 | 25.4 | 108 | 24 | Forged | 1.4 |
| 1½" | DN40 | 38.1 | 125 | 52 | Forged | 2.3 |
| 2" | DN50 | 50.8 | 150 | 88 | Forged | 3.5 |
| 2½" | DN65 | 63.5 | 180 | 140 | Cast | 5.2 |
| 3" | DN80 | 76.2 | 210 | 210 | Cast | 7.8 |
| 4" | DN100 | 101.6 | 260 | 380 | Cast | 12.5 |
Operating Conditions
Pressure-temperature rating for diaphragm valves.
Diaphragm material determines temperature and pressure capability. EPDM is standard; PTFE-faced for high-temp.
Service Conditions
- EPDM diaphragm: –40°C to +130°C, max 7 bar
- PTFE-faced diaphragm: –29°C to +180°C, max 10 bar
- Steam SIP cycles: +135°C compatible (PTFE)
- Diaphragm life: 50,000+ cycles typical
- Body materials: Forged 316L or cast CF3M
- Drainability: ASME BPE compliant
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.
USP Class VI
Biocompatibility
USP biological reactivity testing for plastics.
ASTM A276
Stainless Steel Bar
Material specification for 304/316L bodies.
DIN 32676
Tri-Clamp Connections
Dimensional standard for tri-clamp fittings.
ISO 5211
Actuator Mounting
Standardized actuator mounting for automation.
Product Variants
Diaphragm Valve configurations for different process roles.
Multiple variants available to match your application requirements. Browse related products for complete process line coverage.
Manual Diaphragm Valves
Hand-wheel operated for manual isolation in clean utility and product lines.
Request quote →
Pneumatic Diaphragm
Air-actuated for automated process control with position feedback options.
Open page →Tank Bottom Diaphragm
Flush-mount for tank drainage with minimal dead-leg in vessel applications.
Request quote →Multi-Port Block
Manifold blocks with multiple integrated diaphragm valves for compact systems.
Request quote →Materials & Standards
High-purity valve sourcing language.
Clarify material, diaphragm, connection, operation and documentation before quotation.
316L / 304
Stainless material grade should be defined by project requirement.
ASME BPE / 3-A language
High-purity and sanitary design references by RFQ.
MTR / QC / Certificates
Documentation expectations can be included in the RFQ package.
Technical Overview
Typical diaphragm valve RFQ fields.
Final selection should be reviewed against service media, cleaning method and process requirements.
| Requirement | Typical Information Needed |
|---|---|
| Valve Type | Sanitary diaphragm valve |
| Material Grade | 316L or 304 stainless steel by RFQ |
| Connection Type | Tri-clamp, weld end or project-specific connection |
| Diaphragm | EPDM, PTFE or other material by service condition |
| Operation | Manual, pneumatic or electric actuation |
| Documentation | MTR/MTC, certificates, inspection or finish requirements |
Engineering RFQ
Prepare a diaphragm valve RFQ package.
Include valve size, body type, diaphragm material, connection, actuator requirement, quantity and documentation expectations.
- 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 diaphragm valves.
Engineering and procurement questions we hear most often. For project-specific guidance, send your application details via RFQ.
Why use a diaphragm valve instead of a ball valve?
Diaphragm valves offer crevice-free, fully drainable design with no internal cavity for product trapping. They are the standard for ASME BPE pharmaceutical and biotech applications.
Ball valves have ball cavity behind the seats that can trap product. For aseptic, WFI and high-purity service, diaphragm valves provide superior cleanability per ASME BPE.
How often should diaphragms be replaced?
Standard EPDM diaphragms last 50,000+ cycles in normal service. Replace based on cycle count, visible wear, or as preventive maintenance every 6–12 months.
PTFE-faced diaphragms last longer but are more expensive. For steam SIP service, replace every 3–6 months due to thermal cycling stress.
What is the maximum operating temperature?
EPDM diaphragms: –40°C to +130°C continuous. PTFE-faced two-piece: –29°C to +180°C continuous, suitable for +135°C steam SIP cycles.
For continuous high temperature above 130°C, specify PTFE-faced two-piece diaphragms. The PTFE face contacts the media while EPDM backing provides sealing action.
Are forged and cast bodies different in performance?
Forged bodies (DN8–DN50) offer superior surface finish and consistency. Cast bodies (DN65 and larger) are more economical at large sizes but may have surface variation.
Both are suitable for ASME BPE applications when properly finished. Electropolished cast bodies meet SF4 (Ra ≤ 0.38 μm) requirements.
Can diaphragm valves handle particulates?
Yes — diaphragm valves are well-suited for slurries, particulates and viscous media because the diaphragm wipes clean during operation with no cavity to trap solids.
Avoid sharp particulates that could damage the diaphragm. For abrasive media, specify thicker PTFE-faced diaphragms and consider reduced cycle frequency.
What is the difference between weir and straight-through types?
Weir-type has an internal weir that the diaphragm closes against. Straight-through (full-bore) has no weir for unobstructed flow — better for slurries.
Weir-type provides better flow control characteristics. Straight-through is preferred for particulates but has limited size availability.
What documentation is provided?
Standard: 3.1 MTR, FDA compliance for diaphragm, pressure test certificate. Optional: ASME BPE surface finish report, USP Class VI biocompatibility, full traceability.
For validated pharmaceutical applications, request the full BPE documentation package including ferrite content and helium leak test results.
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 diaphragm valve requirement?
Send valve size, connection, diaphragm material, actuation, quantity and documentation 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.