FTL71 Spare Parts List Overview
FTL71 is a classic model in the Endress+Hauser Liquiphant series of tuning fork level limit switches, widely used for liquid level limit detection. This spare parts list covers key spare parts such as aluminum covers, plastic covers, transparent covers, seal kits, electronic inserts, sliding sleeves, adapters, cable glands, and is applicable to FTL50/FTL51/FTL51C, FTL70/FTL71, FTL80/FTL81/FTL85 series, etc. The following lists order numbers, specifications, and applicable models by function, making it easy for engineering technicians and procurement to quickly select parts.
1. Housing Covers and Seals
Housing covers and seals are key components to ensure the instrument's protection rating and Ex d explosion-proof performance. When selecting, pay attention to the housing material (aluminum, polyester, stainless steel) and explosion-proof rating.
1.1 Aluminum Cover (Aluminium housing)
| Order Number | Specification | Applicable Housing |
|---|---|---|
| 52002698 | Aluminum cover + O-ring EPDM | F13, Ex d |
| 52002699 | Aluminum cover + O-ring EPDM | F17 |
| 52006903 | Aluminum cover + O-ring EPDM | Liquiphant M/S, Liquicap M, Soliphant M |
| 52007103 | Aluminum cover + O-ring EPDM | Terminal compartment T13 |
1.2 Plastic Cover and Transparent Cover (Polyester housing)
- 52025606: Plastic cover + gasket EPDM, suitable for polyester housing
- 52025790: Transparent cover + gasket EPDM, suitable for polyester housing
1.3 Stainless Steel Housing Cover
71114754: Cover, material 316L, O-ring 70.0x3.0 EPDM. Suitable for stainless steel housing F27, as well as FTL50/FTL51/FTL51C, FTL70/FTL71, FTL80/FTL81/FTL85.
1.4 Seal Kits
| Order Number | Specification | Applicable Model/Remarks |
|---|---|---|
| 52004137 | O-ring, cover seal kit | Polyester housing F16 |
| 52004277 | Seal kit: 10x O-ring 70.0x3.0 EPDM | Universal |
| 52008495 | Seal kit, for cover | Universal |
| 71114756 | Seal kit: 5x O-ring 70.0x3.0 FVQM | FTL50/FTL51/FTL51C, FTL70/FTL71, FTL80/FTL81/FTL85 |
2. Adapters and Cable Glands
Adapters are used to connect different housing types, and cable glands are used for cable entry sealing. When selecting, confirm the housing model and cable outer diameter.
2.1 Adapters
- 52004236: Mounting kit, including retaining ring 301, adapter ring PPA, suitable for Liquiphant M/S
- 52004133: Adapter, suitable for polyester housing F16
- 52004134: Adapter, suitable for polyester housing F16
- 52004135: Adapter, suitable for polyester housing F16
2.2 Cable Glands
71185029: Cable gland M20, metal material, with O-ring 17.0x2.0 EPDM + PTFE/FDA. Suitable for stainless steel housing F15, as well as FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL70/FTL71, FTL80/FTL81/FTL85.
3. Electronic Inserts
The electronic insert is the core component of the FTL71, determining the output signal type and power supply method. When replacing, confirm the original instrument model and output type.
3.1 Electronic Insert Selection Table
| Order Number | Output Type | Applicable Model |
|---|---|---|
| 52002304 | 2-wire limit switch | Liquiphant M/S (HT) |
| 52002305 | 3-wire limit switch | Liquiphant M/S (HT) |
| 52002306 | 19-253VAC / 19-55VDC | Liquiphant M/S (HT) |
| 52002307 | 2-wire 4-20mA | Liquiphant M/S (HT) |
| 52002308 | 2-wire limit switch | Liquiphant M/S (HT) |
| 52002309 | 2-wire limit switch | Liquiphant M/S (HT) |
| 52006454 | 2-wire + button | Liquiphant M/S (HT) |
| 71074953 | PROFIBUS PA | FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL70/FTL71 |
71074953 detailed parameters: Hardware version 02.00, software version 01.03.00, current consumption 12.5mA±1.0mA.
4. Sliding Sleeves
Sliding sleeves are used to adjust the switch point, suitable for high-pressure or on-site adjustment applications. When selecting, confirm the process connection thread, material, and pressure rating.
4.1 Sliding Sleeve Selection Table
| Order Number | Thread | Material | Pressure/Certification | Applicable Model |
|---|---|---|---|---|
| 71118691 | G1 | AlloyC22 | 100bar, EN10204-3.1 | FTL41, FTL51, FTL51B, FTL71, FTL81 |
| 52003663 | G1 | 316L | 100bar | FTL51/FTL71 |
| 52011880 | G1 | 316L | 100bar, EN10204-3.1 | FTL51/FTL71 |
| 52003664 | G1 | AlloyC4 | 100bar | FTL51/FTL71 |
| 52003665 | G1-1/2 | 316L | 100bar | FTL51/FTL71 |
| 52011882 | G1-1/2 | 316L | 100bar, EN10204-3.1 | FTL51/FTL71 |
| 52003666 | G1-1/2 | AlloyC4 | 100bar | FTL51/FTL71 |
| 52011889 | NPT1 | 316L | Low pressure, EN10204-3.1 | FTL51/FTL71 |
| 71118694 | NPT1 | AlloyC22 | 100bar, EN10204-3.1 | FTL51, FTL51B, FTL64, FTL71, FTL81 |
| 52003981 | — | 316L | Low pressure | FTL51/FTL71 |
4.2 Fork Protection
- 71639787: Threaded fork protection, suitable for marine applications, applicable to FTL51B, FTL64, FTL50, FTL51, FTL70, FTL71
- 71639788: Threaded slotted fork protection, suitable for marine applications, applicable to FTL51B, FTL64, FTL50, FTL51, FTL70, FTL71
5. Other Accessories
5.1 Sunshade Covers
- 71127760: Sunshade cover, suitable for FDR56, FMI21, FMI51/FMI52, FQR56, FTI51/FTI52/FTI55/FTI56, FTI77, FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL70/FTL71, FTL80/FTL81/FTL85, FTM20/FTM21, FTM50/FTM51/FTM52, FTR20, FTW31/FTW32/FTW33
- 71040497: Sunshade cover, suitable for FMI51/FMI52, FTI51/FTI52/FTI55/FTI56, FTI77, FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL70/FTL71, FTL80/FTL81/FTL85, FTM20/FTM21, FTM50/FTM51/FTM52
- 942262-0000: Weather protection cover F6/F10, material PA, suitable for FTL70/FTL71
5.2 Process Seals
- 52014048: Process seal, for G1 process connection
- 52014047: Process seal, for G1-1/2 process connection
5.3 Lubricant and Nameplate
- 52005977: Lubricant "SYNTHESO GLEP1", 8g tube
- 71067434: Blank modification nameplate, for filling in the new order number after modification of non-Ex instruments. Suitable for FMB50/FMB51/FMB52, FMR230/FMR231, FMR240/FMR244/FMR245, FMR250, FMR530/FMR532, FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL70/FTL71, FTL80/FTL81/FTL85, NMR81, PMC51, PMC71, PMP51/PMP55
6. Selection Notes
- Confirm housing type: Aluminum housing, polyester housing, and stainless steel housing correspond to different covers and seals, and cannot be mixed.
- Confirm explosion-proof rating: Ex d applications require aluminum covers with corresponding explosion-proof certification, such as 52002698.
- Confirm process connection: The thread specification of the sliding sleeve (G1, G1-1/2, NPT1) must match the on-site process connection.
- Confirm material requirements: Corrosive media require AlloyC22 or AlloyC4 materials, and confirm whether EN10204-3.1 material certificates are required.
- Confirm output type: The electronic insert must match the control system signal type (2-wire, 3-wire, 4-20mA, PROFIBUS PA, etc.).
- Confirm pressure rating: High-pressure applications require 100bar sliding sleeves, and pay attention to pressure disassembly protection.
7. Frequently Asked Questions (FAQ)
How to select spare parts for FTL71?
First confirm the instrument model and housing type, then select the corresponding spare parts according to functional requirements. The electronic insert must match the output signal, the sliding sleeve must match the process connection and pressure rating, and the seals must match the housing material.
What is the difference between aluminum cover and plastic cover?
The aluminum cover is suitable for aluminum housings and Ex d explosion-proof applications, with high mechanical strength; the plastic cover and transparent cover are suitable for polyester housings. The transparent cover allows observation of internal status but is not suitable for high protection rating applications.
How to adjust the switch point of the sliding sleeve?
The sliding sleeve adjusts its position through threads to change the switch point. Adjustment must be performed under no pressure. The pressure disassembly protection function prevents misoperation.
Can electronic inserts be interchanged?
Electronic inserts of different output types cannot be directly interchanged. The control system signal type and supply voltage must be confirmed. The PROFIBUS PA insert (71074953) is only suitable for specific models.