5
3. Operation
The SS-414 series of regulator are fitted with a stainless-steel locking cap as standard. It is
recommended that for the pressure adjustment the locking cap is removed, and a 17mm
spanner (or adjustable) is used to control and set the outlet pressure. The locking cap should
then be secured to the adjusting screw and bonnet by tightening the respective grub screws
to prevent further adjustments.
Turning the adjusting screw clockwise compresses the load spring, which in turn opens the
main valve, and allows the inlet pressure to pass through the orifice until the outlet pressure
is equivalent to the loading forces set by the compressed spring.
The SS-414 is offered with either a sealed chamber, or a reference chamber.
A sealed chamber option ensures that the outlet pressure set at the surface will remain
unaffected by sea water pressure during its operation
A reference chamber allows the regulator to respond to the atmospheric conditions during
its descent and/or ascent* at an approx. ratio of 1:1. The subsea regulator with reference
must be ‘self
-
venting’ in order to respond to the external atmospheric conditions during
ascent.
Where applicable, the vent port and the reference port of the SS-414 are fitted with a debris
filter as standard.
The SS-414 can be supplied set and locked to pre-defined pressure conditions. Regulators will
be fully adjustable through a given pressure range and the maximum allowable working
pressures will be indicated on the regulator label and in the part number.
Pressure locking regulators are fitted with a locking cap which may be set (when specified) to
pre-determined requirements. It is secured in place by three M5 grub screws which lock
against the bonnet of the regulator creating an anti-tamper device to ensure the pressure
cannot be adjusted accidentally.
Pre-set pressure regulators are adjusted (factory set) to specified customer requirements
within a given pressure range.
