Interpretation Of Results; Pressure Gauge Check Rig; Integrity Test - Seetru Quicktester Operating Instructions

Valve Test Port 2
(Shown with Safety
Valve & adaptor fitted)
Outlet
Control Valve
Inlet Control
Valve 1
4.

Interpretation of Results

4.1 Correct Set Pressure Reading - If the reading on the dial gauge at test stage 3.5 falls within the allowed tolerance range of the set
pressure of the safety relief valve then this is confirmation that it's set pressure is correct.
4.2 Incorrect Set Pressure Reading - If the reading on the dial gauge at test stage 3.5 is above or below the allowable tolerance
range of the set pressure of the safety relief valve then this indicates that the safety relief valve is not set correctly. The safety
relief valve should be overhauled or replaced.
4.3 Correct Re-Seal Pressure Reading - If the reading on the pressure gauge at test stage 3.6 is not less than the allowed re-seat
pressure then this is confirmation that the valve has re-sealed correctly.
4.4 Incorrect Re-Seal Pressure Reading - If the reading on the pressure gauge at test stage 3.6 is less than the allowed re-seat
pressure then this indicates that the safety relief valve has not re-sealed correctly. The valve should be overhauled or replaced.
4.5 General - The safety relief valve manufacturer should always be consulted if there is any doubt about the acceptability of the
performance of the safety relief valve.
Note. Seetru Limited offers a safety relief valve refurbishment service.
5.

Pressure Gauge Check Rig

The unit may also be used to check the accuracy of pressure gauges against a known standard reference gauge.
Follow the set up procedure 2 but mount the pressure gauge to be checked in the safety relief valve test port 2. It is also
recommended that the regulated gauge pressure is not greater than the full-scale deflection of the gauge to be checked up to
a maximum pressure of 55 Bar.g.
The sequence of operation is similar to that for safety relief valves, however the pressure is applied incrementally at the desired
check pressures. Use outlet control valve 2 to vent the pressure prior to removal of the tested gauge.
6.

Integrity Test

The integrity of the internal pipe-work must be checked every 12 months. This is carried out as follows:
6.1 Fit a dial gauge, which has a full-scale deflection of greater than 55 bar to pressure gauge port 3.
6.2 Fit the sealing plug into the safety relief valve test port 2.
6.3 Connect the unit to a regulated supply.
6.4 Adjust the supply regulator to 55 bar.
6.5 Ensure outlet control valve 2 is closed.
6.6 Open inlet control valve 1 and pressurise the unit to 55 bar.
6.7 Watch the dial gauge rise and stop at 55 bar.
6.8 Shut off inlet control valve 1.
6.9 Watch the dial gauge for 1 minute. The pressure must not drop.
6.10 If a pressure drop is observed check each connection for leaks.
6.11 Use outlet control valve 2 to vent the unit pressure to atmosphere.
6.12 Disconnect the supply at inlet port 1 and tighten any leaking joint or replace seals as required (refer to section 8 - Maintenance).
6.13 Repeat the test from stage 6.3.
Quicktester Installation, Operating and Maintenance Instructions
Picture A - Quicktester
Issue: 3
Pressure Gauge
Port 3
(Shown with
Digital Gauge
Inlet Port 1
03/08/04 G43INS Page 2 of 3