General technical information

The following technical specifications are valid for all HAFNER valves.
 

Temperature range:
 

Several customer-specific items have been catered for an enlarged temperature range.


Leckage rate at 6 bar pressure:

All (100 % of) the HAFNER valves leaving the factory are individually tested on function and leakage.
The following leakage rate is allowed and a valve is still rated as good with the following:

• Internal leakage: 4 cm³ / min
• External leakage: 2 cm² / min

For TT-valves only:
At temperatures below - 40°C the internal leakage can increase to 10 cm³ / min.


Standard materials used for HAFNER valves:

PA = Polyamide
1.4404 = high graded stainless steel
POM = Polyoxymethlene
FKM = Fluoroelastomer

General Warranty:

The general warranty is 12 month from delivery. Warranty expires when valves have been opened.


Recommended signal length:

The recommended signal length to reach full flow is 50 msek.


Operation and required air-quality:

The valves are designed for being used with cleaned and lubricated or cleaned and unlubricated compressed air.
Required Air-quality-level in accordance to ISO 8573-1:2010: 7 – 4 – 4 for particles – water – oil


Lubrication:

Valves do not require any lubrication but lubrication in general increases the life-time of the products. Please avoid to lubricate the valves during a certain period of time and let them run dry later.

For low-temperatureitems:
Do not lubricate as most kinds of oil and grease do not properly operate below - 25°C.

Voltage tolerance:

The general voltage tolerance of all solenoid systems is +/- 10%.


Other:

In accordance to CETOP position paper „PP07 Machine Directive 2006/42/EC”: Single valves placed on the market are not … within the meaning of Annex V, point 4 of Machine Directive 2006/42/EC.

The HAFNER company policy is one of a continuous improvement process. We therefore reserve the right to amend, enhance and change specifications of the products presented in this document without notice.