SMC Networks HRS090-A, Operation Manual

Page: 52 / 196

HRX-OM-S004
Chapter 3 Transport and Setting Up
3.5
Circulating Fluid Supply HRS Series
3-32
„ 15% aqueous solution of ethylene glycol
When a 15% aqueous solution of ethylene glycol is used, prepare the ethylene glycol aqueous
solution separately.
To control the density of the ethylene glycol aqueous solution, a densitometer is available (sold
separately) from SMC.
Item No Remarks
Ethylene glycol aqueous solution 60% HRZ-BR001
Please dilute to 15% with tap
water and use it.
Densitometer HRZ-BR002 －
„
Piping of the overflow
Piping name Port size Piping specification
Automatic fluid fill port Rc1/2 Supply pressure: 0.2 to 0.5MPa
Overflow port Rc1
The piping should be ø25 mm or more and the
length of 5 meters or less.
Avoid riser piping (trapping part).
Fig. 3-21 Piping of the automatic fluid-fill port and overflow
z When using the a 15% aqueous solution of ethylene glycol, collect
the overflowed fluid in the recycling pit and dispose it according to
the local low of the country and area that the product is installed.
z When a 15% aqueous solution of ethylene glycol is used, check the
density periodically because the density will be lower due to the
automatic fluid-fill function.