Weldable Hygienic Ball Valve S.W. 316L stainless steel
Pickup availability could not be loaded
Weldable Hygienic Ball Valve in 316L Stainless Steel — Cavity Filled, PTFE / TFM1600
Cematic's weldable hygienic ball valve in 316L stainless steel is the fluid control component for permanent sanitary installations where a butt-welded connection ensures maximum circuit integrity. Unlike the version with a clamp connection, this valve is welded directly to the process piping.
This eliminates all mechanical joint points that could be sources of leakage or contamination. Its cavity-filled design also eliminates dead spaces between the ball and the body, making it the right choice for high-purity applications where product retention in internal cavities is unacceptable.
It is also available with a PTFE or TFM1600 seat depending on the chemical and mechanical resistance requirements of the process. In addition, its ISO5211 mounting allows pneumatic or electric actuators to be installed without replacing the valve, thereby protecting the investment against changes in the plant's automation level.
Operating Principle — Weldable Hygienic Ball Valve
The ball rotates 90° between the fully open and fully closed positions. In the open position, the ball bore is aligned with the piping, allowing fluid to flow without obstruction or significant pressure drops.
In the closed position, however, the ball rotates 90° and completely blocks the fluid passage. This ensures a tight seal, independent of differential pressure.
The cavity-filled design is also the key differentiator from conventional ball valves. In a standard valve, there are spaces between the ball and the body that retain product between cycles. The cavity-filled design eliminates these spaces, meaning fluid is not trapped, and effective CIP cleaning can be achieved without disassembling the valve.
Weldable vs. Clamp Connection — When to choose each option
The choice between a weldable and a clamp connection depends on the type of installation and the operational requirements of the process. The weldable connection is the correct choice in the following cases:
- Permanent high-purity installations: The welded joint has no external gaskets or retention cavities, making it the preferred type of connection in aseptic systems where external contamination is unacceptable.
- Reduced leak points: In circuits with many valves, welding eliminates mechanical joints. This reduces the total number of potential leak points in the installation.
- High-pressure systems: The welded joint also withstands higher pressures than the clamp connection. It does not rely on mechanical tightening of the clamp to maintain the seal.
The clamp connection, on the other hand, is suitable when the valve needs to be frequently disassembled for inspection or maintenance. For this application, see the hygienic ball valve with clamp connection →
Construction Materials
The body is made of 316L stainless steel, which is the standard material in demanding hygienic applications, as its molybdenum content offers greater resistance to chlorides and cleaning agents than SS304. The ball is also made of SS316L, maintaining material consistency throughout the fluid contact area.
The internal finish Ra ≤ 0.8 µm eliminates surface roughness that could retain product or microorganisms. Finally, the ISO5211 mounting is integrated into the body, allowing the valve to be automated with any compatible quarter-turn actuator.
Available Seats — PTFE or TFM1600
PTFE Teflon is chemically inert to most fluids, making it ideal for environments with aggressive or corrosive fluids. Its low coefficient of friction also improves valve performance in frequent opening and closing cycles.
TFM1600, on the other hand, has similar properties to PTFE but with significant improvements in mechanical and abrasion resistance. It also maintains its stable properties at higher temperatures than conventional PTFE, making it the correct choice for processes with frequent thermal cycles or high pressures.
Technical Specifications
| Parameter | Value |
|---|---|
| Body and ball material | 316L Stainless Steel (SS316L) |
| Available seats | PTFE (Teflon) or TFM1600 |
| Connection | Butt Weld (S.W.) |
| Design | Cavity Filled (no dead spaces) |
| Actuator mounting | ISO5211 |
| Maximum working pressure | 1000 psi (PN63) |
| Minimum temperature | -20 °C |
| Maximum temperature | 180 °C |
| Internal finish | Ra ≤ 0.8 µm |
| Operation | Manual (lever), pneumatic or electric actuator |
Operation Options
The weldable hygienic ball valve is available in three operation modes. The manual lever is the standard option, requiring no electrical or pneumatic power. The pneumatic actuator, however, automates opening and closing using compressed air.
This allows the valve to be integrated into PLC control systems. Finally, the On-Off or modulating electric actuator is for processes where proportional position control is necessary. All options are supplied assembled and tested, ready for installation.
Fluid Compatibility
This weldable hygienic ball valve is compatible with a wide range of fluids in the sanitary and industrial sectors. The main groups are described below:
- Purified water and water for injection (WFI) — SS316L does not contribute metallic ions; therefore, it is the standard material in high-purity pharmaceutical and biotechnological lines.
- Food fluids — dairy products, juices, beer, vegetable oils — SS316L and PTFE/TFM1600 seats comply with food contact requirements; also, the Ra ≤ 0.8 µm finish prevents residue retention between batches.
- Clean steam and hot water up to 180 °C — the welded connection eliminates leak points that exist in clamp joints at SIP sterilization temperatures; in addition, SS316L resists condensate without corrosion.
- CIP agents — caustic soda, nitric acid, peracetic acid — PTFE and TFM1600 are inert to CIP cleaning agents; however, verify concentration and temperature with Cematic's technical team for extreme conditions.
- Corrosive chemical fluids — PTFE is inert to most acids, bases, and solvents; for extremely aggressive fluids, TFM1600 offers greater mechanical and abrasion resistance.
Applications of the weldable hygienic ball valve
Pharmaceutical and Biotechnology Industry
The weldable hygienic ball valve is the standard component in aseptic lines for pharmaceutical and biotechnological production. The welded connection eliminates mechanical joints, thereby reducing microbiological risk points in the circuit. In addition, the cavity-filled design ensures no product residue remains between cycles, which is a requirement in validated GMP processes.
Food and Beverage Industry
In food and beverage production lines, this valve controls the flow of dairy products, juices, beers, and oils with total hygienic integrity. The welded connection is also the standard for installation in these lines.
SS316L and PTFE/TFM1600 seats also comply with food contact requirements. Additionally, effective CIP cleaning is achieved without disassembling the valve thanks to the cavity-filled design.
High-Temperature CIP and SIP Systems
In automated cleaning and sterilization systems, this valve also withstands the aggressive conditions of CIP/SIP cycles. The welded connection does not exhibit gasket deterioration that occurs in clamp connections after many temperature cycles. Consequently, it is the most durable option in installations with frequent CIP/SIP cycles.
High-Purity Chemical Industry
In chemical process plants, the cavity-filled design of SS316L with a PTFE or TFM1600 seat meets purity requirements. Therefore, it is the correct component when the fluid requires inert materials and no dead spaces.
This makes it the correct component in high-purity chemical installations where conventional valves generate contamination due to fluid retention in internal cavities.
For the complete range of hygienic valves, see hygienic valves collection →