PCS Technical Notes: M21, Limitations, Updates

Limitations and data sheet updates and corrections

- Valve Position: for the M21 the needle valve is only available at the inlet.

- Flowmeters and regulators are only available in SS-316 and, in special circumstances, Hastalloy C.

- Maximum viscosity of 10 cP.

- Maximum pressure options for up to 400 Bar. Standard version is for up to 40 Bar.
Higher pressure ratings have a higher price and delivery time. Ask for a special quotation for pressures above 40 Bar

- Maximum temperature for standard version without transmitter or alarms is -25 to +150 C.
This can be increased to -25 to +180 C with the thermal protection option.

- Maximum temperature for standard version with transmitter or alarms is -20 to +60 C.
This can be increased to -20 to +85 C with the thermal protection option.

- With the 2 x AMD alarm option in the M21, the actual range of actuation is 0 to 25% (low flow) and 75 to 100% (high flow). This is due to the dimensions of the inductive sensors.

- As standard the AMD switch is supplied as a 2 Wire inductive prox sensor (supply 5-24 Vdc) and the amplifying relay is not included. If required, the amplifying relay is an optional extra.