Advertisement
Installation and Operating Instructions
Limits Of Use
These valves have been categorised in accordance with the Pressure
Equipment Directive–PED.
The fluid to be transported is limited to group 2 liquids i.e. non-hazardous.
On no account must these valves be used on any group 1 liquids, group 1
gases or group 2 gases.
Installation
These instructions are issued as guidelines only and do not cover all installed
conditions. If unsure, please contact our Technical Helpline before installation.
•
Hattersley products are designed for installation and use within suitably
designed systems reflecting CIBSE, BSRIA and HVAC guidelines. Particular
care should be taking with regards to;
-
accessibility to valve for setting/adjustment
-
tube cutting
-
jointing
-
bracketing/supports
•
orientation: whilst the PICV can operate correctly in different orientations,
there are recommendations regarding the orientation of actuators - Please refer
to separate actuator IOM
•
would normally be installed on return pipework, i.e. after the equipment it is
controlling, but can be installed in flow if required.
•
ensure direction of flow is correct - indicated by cast arrow on body.
•
Fig. 1934 operates between a minimum and maximum pressure drop across
the valve - see commissioning.
•
PICV's are not designed as isolation valves. Dedicated isolation valves
should be installed to isolate against system pressure, i.e. for maintenance
etc., when disconnecting/draining pipework.
•
systems should be installed with strainers to protect the PICV and other
installed items.
Hattersley – Pressure Independent Control Valve – Fig. 1934
Advertisement
