Single Seat Valves & Double Seat Valves
Alfa Laval’s range of single seat valves consists of large numbers of purpose-designed valve units that are very robust and flexible. They are ideal for use in processes with a high hygiene standard.
On the other hand, double seat valve concept provides modular solutions that are easily tailored to any specific requirement. The double seat design provides long-lasting, spillage-free operation thus minimizing the risk of product contamination. The use of double lip seals provides added protection to ensure safe and hygienic operation.
Alfa Laval Valve Automations: Indication Unit, IndiTop, ThinkTop, ThinkTop Basic, ThinkTop D30, GreenTop
Single Seat Valve:
Alfa Laval – Unique 7000 Small Single Seat Valve
The Small Single Seat Valve from Alfa Laval features the sanitary and flexible design you know and trust in a fractional size. These 1/2 and 3/4 inch valves are applicable for a wide range of tasks, either as stop valves with two or three ports, or as change-over valves with three to five ports. The SSSV series is suitable for use in food, beverage, dairy, and pharmaceutical industries, wherever the sanitation of a seat valve is needed in fractional sizes.
Alfa Laval’s Small Single Seat Valves are available with the options you’d expect from a seat valve, including a range of seal materials, body styles, and actuation options. All valve configurations come with the quality manufacturing and design you’ve come to expect from Alfa Laval. Authorized to carry the 3-A symbol, the SSSV series provided the sanitary operation you require.
The Unique 7000 SSSV is available in the following sizes: ½ and ¾ inch.
Related Industries:
Processed Foods, Dairy, Beverages, Brewery, Home & Personal Care, Chemical
Application
The small single seat valve series is appropriate for any 1/2 and 3/4 inch application in the food, beverage, and dairy industries where the shut-off of change-over operation of a seat valve is needed.
Working Principle
Small single seat valves can be manually or pneumatically actuated. The SSSV maintains a simple design with only a few moving parts, making it a reliable component in any flow system.
Standard Design
The SSSV is available in ½ inch and ¾ inch OD tube connections. The design is composed of an actuator, lip seal, plug, and one or two valve bodies. The unique plug design is made from PVDF and the valve body interior has a 20 ?inch Ra surface finish for high cleanability. The valve maintains an open yoke design and is authorized to carry the 3A symbol. Valve bodies and actuators are connected via a clamp connection. The piston and valve plug maintain a threaded connection. Tri-Clamp or weld connections are standard.
Materials
| Product Wetted Steel Parts | 316L |
| Finish (ID) | <20 Ra Standard |
| Other steel parts | 304 |
| Plug | PVDF |
| Product wetted seals | EPDM (standard), HNBR, FPM (optional) |
| Other seals | NBR |
| Material grades | Molded elastomers of EPDM or SFYO-rings and seals of EPDM or SFY (Flouroelastomer) |
Technical Data
| Max product pressure | 145 psi |
| Min product pressure | Full vacuum |
| Temperature range | 14°F – 284°F (EPDM) |
| Air pressure | 14.5 – 101.5 psi |
Actuator Function
- Pneumatic downward movement, spring return (NO).
- Pneumatic upward movement, spring return (NC).
- Manually operated.
Dimensional Data
| ½ in | ¾ in |
| A1 | 6.78 | 6.74 |
| A2 | 7.06 | 7.17 |
| A3 | 7.88 | 8.24 |
| A4 | 8.16 | 8.67 |
| C | 1.27 | 1.50 |
| OD | 0.50 | 0.75 |
| ID | 0.37 | 0.62 |
| t | 0.06 | 0.06 |
| E1 | 1.17 | 1.18 |
| E2 | 1.77 | 1.77 |
| F1 | 0.28 | 0.43 |
| F2 | 0.28 | 0.43 |
| H | 2.24 | 2.24 |
| Weight (lb) Stop valve | 2.36 | 2.43 |
| Weight (lb) Change-over valve | 3.00 | 3.11 |
*Dimensions valid for both welding ends and clamp ends.
