Valves for Custody Metering Skid
Where product changes ownership, valve seat tightness becomes money. Metering skids run on double-block-and-bleed isolation so every meter run and prover connection can be proven leak-free.
Which valves are used on a custody metering skid?
A custody metering skid carries 5 characteristic valve interfaces: meter-run isolation, flow control / back-pressure, prover loop isolation, strainers (upstream of meters), sampling and pressure points. Each position, its usual valve configuration and the engineering reason are below. Typical specs are indicative — line class and project specification govern.
The Valve Interface Map
Meter-run isolation
Ball Valves →DBB trunnion ball valves
Run switching with proved zero leakage - a passing valve here is an accounting error, not just a maintenance item.
Double-block-and-bleed with body bleed monitored; seat class is the specification battleground.
Flow control / back-pressure
Control Valves →Globe control valve
Holds each run inside its calibrated flow band and keeps the meter above vapour pressure on liquids.
Prover loop isolation
Ball Valves →DBB ball valves / four-way diverter
Routes flow through the prover with verified isolation - the heart of meter proving.
Strainers (upstream of meters)
Strainers →Basket strainer
Protects turbine/PD meters from debris; condition monitoring by differential pressure.
Sampling and pressure points
Needle Valves →Needle valves and manifolds
Automatic samplers and pressure/temperature instrument isolation.
Isolation Strategy
- Every custody boundary valve is DBB with a monitored bleed - proof of isolation is contractual, not just procedural
- Run change sequences avoid dead-heading the control valve and flow surges through the meters
Maintenance Notes
- Seat tightness verified at every proving cycle; leakage trends feed the valve overhaul schedule
- Strainer baskets inspected on differential pressure - not on the calendar
Governing & Adjacent Standards
Other equipment valve references
Connected Engineering
Sourcing valves for a custody metering skid?
Send your equipment datasheet or line list — we supply the full valve set (Ball Valves, Control Valves, Strainers, Needle Valves) with certification, in one PO.