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3.2 Maintenance
Maintenance is needed when a leak occurs at product outlet (P₁) valve A and/or product return (P₂) valve B.
1.
Prior to performing maintenance, the Pitot Probe must be removed from the pipeline. See Section 2.3, Removing the
Pitot Probe, for instructions on removing the Pitot Probe from the pipeline.
2.
Unscrew product outlet (P₁) valve A and/or product return (P₂) valve B from the pipeline connection (Figure 2, Figure 3,
or Figure 4).
3.
To perform maintenance on product outlet (P₁) valve A and/or product return (P₂) valve B, refer to the Installation,
Operation, and Maintenance (IOM) Manual for the valve(s).
4.
As necessary, clean the probe.
5.
Install product outlet (P₁) valve A and/or product return (P₂) valve B to the pipeline connection (Figure 2, Figure 3, or
Figure 4).
6.
Maintenance is now complete. Reinstall the Pitot Probe according to the instructions in Section 2.2, Installation and
Operation.
Check valves for leaks and repair as necessary during reinstallation.
3.3 Troubleshooting
Issues
Product outlet (P₁) valve A and/or
product return (P₂) valve B is
leaking.
14
IOM-101
MODELS: PP-1, PP-2, PP-3, and PP-F
Table 5: Pitot Probe Troubleshooting
Possible Causes
There is debris in the valve.
The valve O-rings and/or seat are worn or
damaged.
REV: C
13839 West Bellfort Street, Sugar Land, TX 77498
Solutions
Maintain the valve. Refer to the
Installation, Operation, and Maintenance
(IOM) Manual for the valve for
maintenance instructions.
Maintain the valve. Refer to the
Installation, Operation, and Maintenance
(IOM) Manual for the valve for
maintenance instructions.
welker.com
Service Department 281.491.2331
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