Maridis Spare parts


Indicator valves serve the purpose to measure and monitor cylinder pressures in large-bore diesel and
other engines. The core of the Indicator Valve Type S473 is the spring-loaded needle tip. This function
prevents the valve from being opened due to engine vibration. It also allows easy operation even at all
Max. allowable (working) pressure (PS): 300 bar (4,351 psi)
Bore Size: 0.236“ (6 mm)


+ Max. operating pressure: 300 bar
+ Forged carbon steel valve body
+ Stainless steel internal parts
+ Indicator connection W 27 x 1/10“
+ Female cone or 1 3/16“-10, male cone

Standard engine thread connections:

• British standard whitworth (BSW)
• British standard pipe parallel (BSP P)
• Symbol G = external and internal parallel (ISO 228)
• Metric screw threads (coarse and fine pitch)
• National pipe thread (NPT)

Special threads, engine or indicator end, are available.

» Indicator Valves Type S473 Standard

Request form

Please remember to include type of engine, for which the spare parts are intended. Please specify the number of items. You will receive our confirmation as soon as possible.

Thread engine side Thread indicator Handle Order-No. Quantity*
3/4 -10 BSW W 27 x 1/10“ hand wheel MP 1149
W 27 x 1/10“ with cap MP 1150
Please add 7 and 3.

*Please fill in mandatory items.

Indicator Valves Type S473 Standard

Indicator Valves Type S473 Standard