Series S
Series S :
Pneumatically Actuated 3/2 & 5/2 Spool Valves (Pilot Operated)
Mercury’s pneumatically actuated (pilot-operated) 3/2 and 5/2 spool valves are engineered for precise and reliable air flow control in industrial automation. These valves use a pneumatic signal to shift the main spool, making them ideal for remote operation or when electrical actuation isn’t suitable.
Why Use Pilot-Operated Valves?
Pilot-operated valves are essential when:
-
Higher flow control is needed without manual or electric actuation
-
Electrical actuation is restricted (e.g., explosive or wet environments)
-
Centralized pneumatic logic or sequential control is used
With robust construction, low actuation pressure, and precision-machined internals, Mercury’s pilot-operated valves ensure consistent performance, long life, and smooth operation—even in demanding environments.
| Model No. | Description | Size (BSP) | Seal Kit No. |
|---|---|---|---|
| S381 | 3/2 (3 WAY) NORMALLY CLOSED PILOT – SPRING VALVE | 1/8″ | SKS381 |
| S382 | 3/2 (3 WAY) NORMALLY CLOSED PILOT – SPRING VALVE | 1/4″ | SKS382 |
| S384 | 3/2 (3 WAY) NORMALLY CLOSED PILOT – SPRING VALVE | 1/2″ | SKS384 |
| S391 | 3/2 (3 WAY) NORMALLY CLOSED PILOT – PILOT VALVE | 1/8″ | SKS391 |
| S392 | 3/2 (3 WAY) NORMALLY CLOSED PILOT – PILOT VALVE | 1/4″ | SKS392 |
| S394 | 3/2 (3 WAY) NORMALLY CLOSED PILOT – PILOT VALVE | 1/2″ | SKS394 |
| Model No. | Description | Size (BSP) | Seal Kit No. |
|---|---|---|---|
| S681 | 5/2 (5 WAY) PILOT – SPRING VALVE | 1/8″ | SKS681 |
| S682 | 5/2 (5 WAY) PILOT – SPRING VALVE | 1/4″ | SKS682 |
| S684 | 5/2 (5 WAY) PILOT – SPRING VALVE | 1/2″ | SKS684 |
*Add Voltage & Connector Suffix While Ordering
| Model No. | Description | Size (BSP) | Seal Kit No. |
|---|---|---|---|
| S691 | 5/2 PILOT – PILOT VALVE WITH MANUAL OVERRIDE | 1/8″ | SKS691 |
| S692 | 5/2 PILOT – PILOT VALVE WITH MANUAL OVERRIDE | 1/4″ | SKS692 |
| S791 | 5/3 PILOT – PILOT VALVE PHN WITH MANUAL OVERRIDE | 1/8″ | SKS791 |
| S792 | 5/3 PILOT – PILOT VALVE PHN WITH MANUAL OVERRIDE | 1/4″ | SKS792 |
| S894 | 5/3 PILOT – PILOT VALVE PAN WITH MANUAL OVERRIDE | 1/2″ | SKS894 |
| S992 | 5/3 PILOT – PILOT VALVE PRN WITH MANUAL OVERRIDE | 1/4″ | SKS992 |
| S994 | 5/3 PILOT – PILOT VALVE PRN WITH MANUAL OVERRIDE | 1/2″ | SKS994 |