Products Description
Need a sanitary, corrosion-resistant valve for high-purity fluid control? Guanjiang's Pneumatic Diaphragm Valve combines a compact pneumatic actuator with a three-way valve body featuring quick-release clamp connections — enabling tool-free installation and rapid disassembly for cleaning. The 316L stainless steel construction resists corrosion while maintaining product purity, making it ideal for handling corrosive, high-purity, or sanitary-grade media. Fast response allows remote control integration with automated production lines in pharmaceutical, food, beverage, and chemical industries.
Key Advantages
Pneumatic Actuator
Compressed air-driven — fast response, high torque. Suitable for remote control and integration with automated production lines (PLC/DCS).
Tool-Free Installation
Quick-release clamp connections allow disassembly without tools — rapid maintenance and cleaning. Ideal for sanitary applications with frequent CIP/SIP cycles.
316L Stainless Steel
Corrosion-resistant construction — withstands aggressive chemicals, high-purity media, and sanitizers. Easy to clean with smooth, crevice-free surfaces.
Three-Way Flow Control
Precisely controls fluid on/off or flow rate switching between ports. Suitable for diverting, mixing, or selecting fluid paths.
Sanitary Diaphragm Design
Weir-type diaphragm isolates process fluid from actuator — zero leakage, no contamination. Ideal for sterile and high-purity applications.
GMP & FDA Compliant
Meets pharmaceutical GMP and FDA requirements — full material traceability available. Suitable for aseptic processing.
Multiple Port Configurations
Available in T-port or L-port configurations — select based on mixing or diverting requirements.
Technical Specifications
| Parameter | Specification |
|---|---|
| Valve Body Material | 316L Stainless Steel (CF3M) — electropolished finish |
| Diaphragm Material | EPDM / PTFE / EPDM+PTFE (santoprene) — FDA compliant |
| Valve Type | Weir-type diaphragm valve |
| Port Configuration | Three-way (T-port / L-port) |
| Size Range | 1/2" ~ 4" (DN15 ~ DN100) — Tri-Clamp connections |
| Actuator Type | Pneumatic (double-acting / spring-return) |
| Operating Pressure | 0 ~ 1.0 MPa (10 bar / 145 PSI) — media dependent |
| Operating Temperature | -20°C ~ 150°C (diaphragm dependent) |
| Control Options | On/Off (solenoid valve) / Modulating (positioner 4-20mA) / Limit switches |
| Standards Compliance | GMP, FDA, 3-A, ASME BPE, ATEX (optional) |
Installation & Maintenance Points:
Installation: Ensure pipeline alignment before clamping. Do not over-tighten clamp — follow torque specifications. Allow diaphragm to fully open/close without obstruction.
Maintenance: Inspect diaphragm regularly for wear or damage — replace every 6-12 months depending on cycle frequency. Disassemble via clamps without tools. Clean wetted parts with CIP/SIP compatible solutions.
Air supply: Use clean, dry compressed air (0.4-0.6 MPa) with filtration (5μm) for actuator. For spring-return models, verify fail-safe position before installation.
Applications
| Industry | Typical Applications |
|---|---|
| Pharmaceutical | WFI distribution, CIP supply/return, bioreactor sampling, sterile filling lines |
| Food & Beverage | Dairy processing, brewery lines, juice transfer, ingredient batching, CIP systems |
| Chemical | Corrosive fluid handling, high-purity chemical transfer, acid/alkali dosing, solvent systems |
| Biotechnology | Media preparation, harvest lines, chromatography skids, fermentation systems |
| Cosmetics | Cream/lotion transfer, ingredient routing, filling systems, process piping |
Frequently Asked Questions
Q1: What is the advantage of a diaphragm valve over a butterfly or ball valve?
A: Diaphragm valves offer superior contamination prevention — the diaphragm completely isolates the process fluid from the actuator and environment. There are no dead legs, no packing glands, and no moving parts in the fluid path. This makes them ideal for sterile, high-purity, and corrosive applications where zero leakage is critical.
Q2: How often should the diaphragm be replaced?
A: Diaphragm replacement intervals depend on cycle frequency, temperature, and media aggressiveness. Typical service life: 6-12 months for continuous cycling, 12-24 months for intermittent use. Inspect regularly for cracking, swelling, or hardening. Replace immediately if leaks appear. We recommend keeping spare diaphragms in stock.
Q3: What is the difference between T-port and L-port three-way valves?
A: T-port allows flow from inlet to either outlet or mixing of two inlets — suitable for blending and diverting. L-port diverts flow from one inlet to one outlet at a time (no mixing) — suitable for simple diversion between two lines. Specify your application requirements for correct selection.
Q4: Can the valve be used for CIP and SIP processes?
A: Yes. The smooth 316L stainless steel body, electro-polished finish, and crevice-free design make it fully CIP (Clean-in-Place) and SIP (Steam-in-Place) compatible. PTFE or EPDM+PTFE diaphragms withstand steam sterilization temperatures (up to 150°C). No disassembly required for cleaning cycles.
Q5: What documentation is provided for pharmaceutical applications?
A: For pharmaceutical applications, we provide mill certificates (EN 10204 3.1) with full material traceability, diaphragm material certificates (FDA compliance, USP Class VI), surface finish test reports (Ra measurements), and actuator documentation. Optional 3.1 certification for all wetted parts is available upon request.
Need a sanitary pneumatic diaphragm valve for your high-purity fluid system?
Request a Quote → Download Datasheet (PDF)* Please provide your valve size (inches/mm), diaphragm material (EPDM/PTFE), actuator type (double-acting/spring-return), and port configuration (T-port/L-port) for a fast, accurate quotation.
