A U-type diaphragm valve is a specialized sanitary valve commonly used in pharmaceutical, food, beverage, and dairy indu...
Inquire1. Brief Introduction of Products:
A butt weld straight way diaphragm valve is a fluid control device that uses a flexible diaphragm to start, stop, or regulate flow. It features a straight-through, unobstructed body—meaning it lacks the internal hump or "weir" found in standard diaphragm valves—and has ends that are directly welded onto the piping system.
2. How It Works?
• Sealing Mechanism: When the valve is closed, a compressor pushes the flexible diaphragm down against a central ridge or seat in the valve body.
• Isolation: The diaphragm completely separates the fluid from the valve's stem and actuator. This eliminates the need for traditional stem packing seals, which can trap bacteria and cause leaks.
• Flow Control: Lifting the actuator allows the diaphragm's natural elasticity to flex upward, providing an unobstructed path for fluid with very low pressure drop.
3. Key Design Features:
• Materials: Product-wetted parts are constructed from high-purity, corrosion-resistant stainless steel (typically 316L). The diaphragm itself is usually made of food/pharmaceutical-grade elastomers like EPDM, Silicone, or PTFE.
• No Dead Legs: They are designed to prevent "dead legs" or crevices where product can pool, which is critical to stopping bacteria and mold growth.
• Cleanability: The smooth internal surfaces are engineered to be easily sterilized and cleaned using Clean-in-Place (CIP) and Steam-in-Place (SIP) methods.
4. Technical Specification:

3A Standards
| Size | L1 | A | H | T |
| 1/2" | 108 | 12.7 | 93.5/102.5 | 1.65 |
| 3/4" | 108 | 19.1 | 93.5/102.5 | 1.65 |
| 1" | 118 | 25.4 | 111.5/122 | 1.65 |
| 1 1/4" | 127 | 31.8 | 144.5/160 | 1.65 |
| 1 1/2" | 146 | 38.1 | 144.5/160 | 1.65 |
| 2" | 190 | 50.8 | 167/190 | 1.65 |
| 2 1/2" | 216 | 63.5 | 199/228 | 1.65 |
This product are also available in DIN, ISO/IDF, SMS, BSP standards. Please feel free to contact us if you need it in other standards!
5. Key Applications and Use Cases:
Because they preserve purity, these valves are an industry standard in:
• Pharmaceuticals and Biotech: Used in the production of sterile drugs, injectables, and vaccines.
• Food and Beverage: Utilized in dairy processing, brewing, and winemaking.
• Cosmetics: Found in manufacturing lines for lotions, creams, and soaps.
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