Lined pressure relief valves
Luofu LFCL valves have an F46 or PFA lining for wet chlorine, strong acids, and alkalis. A lined valve can take the place of a nickel alloy valve in these services. Inlet sizes run from NPS 1 to 8 (DN25 to DN200). Pressure ratings run from Class 150 to Class 300 with ASME flanges, or PN10 to PN40 with PN flanges. The temperature range is -60 to +200 °C (-76 to +392 °F).
Where it is used
In wet chlorine, strong acids, and alkalis, an all-metal valve needs a nickel alloy body and trim.
In an LFCL valve, an F46 or PFA lining covers the main parts that the medium touches. The lined valve can take the place of a nickel alloy valve in these services.
Technical data
- Series
- LFCL lined
- Inlet size
- NPS 1 to 8 (DN25 to DN200)
- Orifice
- API 526 letters D to T, 1"D2" to 8"T10"
- Pressure rating
- Class 150 to Class 300 ASME flanges
PN10 to PN40 PN flanges - Temperature range
- -60 to +200 °C (-76 to +392 °F)
- Set pressure
- Confirmed in the sizing for each tag number
- Lining
- F46 or PFA
These are the limits of the series. The limits of one valve depend on its size, rating, and materials. The sizing confirms them for each tag number. The Class range and the PN range are the ranges we offer with ASME flanges and with PN flanges. One is not a conversion of the other.
Standards and certifications
Orifice sizes use the API 526 letters D to T. The ASME, National Board, and TS documents cover Luofu's production of relief valves. The quotation states which of them apply to each tag:
What we need to quote this valve
Send these with your inquiry. A completed data sheet covers all of them, and the PSV data sheet page explains each line:
- Medium, phase, and concentration
- Required relieving capacity
- Set pressure
- Back pressure at the outlet
- Operating and relieving temperature
- Inlet and outlet size and rating
- Material requirements
- Design code (ASME, API, EAC, or the project specification)
- Quantity, per tag number
- Project country
No data sheet yet? Send what you have. We ask for the rest by email.
Related series
Questions engineers ask
Is the lining PTFE?
No. The lining is F46 or PFA, as we specify. Give the medium, its concentration, and the temperature on the data sheet, and the sizing confirms the lining.
When is a lined valve a better choice than a nickel alloy valve?
A lined valve fits wet chlorine, strong acids, and alkalis when the duty stays within -60 to +200 °C (-76 to +392 °F). The rating must also fall within Class 150 to Class 300. Outside those limits, tell us the duty, and the selection looks at the other series.
Can the valve handle wet chlorine?
Yes. Wet chlorine is one of the services the LFCL series covers. Give the water content and the temperature on the data sheet.