SD4 Series – Double Seal Valves

DELTA SD4 Double Seal Valve Overview

Safe Media Separation for Hygienic Applications

DELTA SD4 valves are (double seal) safe flow valves designed for safe media separation applications in the food, beverage, dairy, pharmaceutical and chemical industries. It is available as a shut-off, change-over and tank bottom valve. Other configurations are available on request. The DELTA SD4 valve is available as a shut-off valve in 4 standard housing configurations. Other configurations are available on request.

Key Advantages

Design and Functionality

• Leakage chamber arranged between the seat seals; the leakage chamber being forcibly closed (open valve) by the two leakage discharge valves (NO) or opened to the atmosphere (closed valve).
• Excellent hygienic characteristics primarily due to the ball-shaped housing without sump or dome.
• Profile seat seals providing crevice-free sealing and the compression of the seat seals is controlled by a metallic stop.
• Leakage discharge valves to drain the neutral area between the seat seals. The leakage discharge valves (activated together with main actuator) are also used as flush – enabling CIP and SIP cleaning of the neutral area.
• Actuator and control unit are standard parts from the SW4 product line. Additionally, a NOT element is fitted to the control unit as standard enabling to maintain higher line pressures.

Configuration Availability

Standard Options

DELTA SD4 valves are offered in four standard shut-off housing configurations. Custom variants are available upon request to meet specific process design needs.

Actuator Warranty & Reliability

The actuator supplied with this valve is covered by a 5-year actuator warranty, or up to 1 million actuations, whichever comes first. Built with fully welded, sealed, maintenance-free construction, it eliminates internal servicing and reduces wear components to deliver long-term durability in demanding hygienic processing environments.

Key benefits include:

• Maintenance-free operation with no internal servicing
• Fewer spare parts and improved total cost of ownership
• uptime and production continuity