ET-LH Series Horizontal Expansion Tanks (Polypropylene Liner) — 8L to 100L

At the heart of every ET-LH Series Horizontal Expansion Tanks (Polypropylene Liner) — 8L to 100L from China Lead Pump lies a construction method that sets it apart from conventional bladder-type vessels. Instead of a thin rubber bladder surrounded by metal, the ET-LH deploys a thick polypropylene liner that forms the primary water chamber, backed by a separate butyl diaphragm that handles air cushion compression. This PP liner eliminates metallic contact with stored water — no scale build-up, no rust particles, no taste or odor transfer — making it an ideal match for drinking water systems, food-grade processing lines, and medical-grade plumbing loops.

The steel clench ring at the equator locks both the liner and the diaphragm into the tank shell with a secure mechanical grip, while reinforced abrasion zones on both components dramatically reduce wear under continuous cycling. Every unit ships with a factory-set pre-charge of 1.8–2.0 bar and carries CE and ISO9001 certifications.

Made in Lead Pump's 20,000 m² facility, available for OEM branding, custom labeling, and tailored export packaging.

ET-LH SERIES — TECHNICAL SPECIFICATIONS

Model	Dia (mm)	Height (mm)	Length (mm)	Connector	Pre-charge (bar)	Packing (cbm)
ET-8LH	200	230	315	1"	1.8–2.0	0.0181
ET-18LH	278	309	367	1"	1.8–2.0	0.0380
ET-24LH	290	321	447	1"	1.8–2.0	0.0496
ET-35LH	318	353	478	1"	1.8–2.0	0.0631
ET-60LH	390	425	530	1"	1.8–2.0	0.1005
ET-80LH	390	425	726	1"	1.8–2.0	0.1367
ET-100LH	430	475	720	1"	1.8–2.0	0.1652

Common Specifications

• Max. Working Pressure: 10 bar
• Max. Working Temperature: 90°C
• Liner: Polypropylene
• Diaphragm: Butyl rubber (EPDM optional)
• Shell Fixation: Steel clench ring
• Connection: Stainless steel, 1" female threaded
• Pre-charge: 1.8–2.0 bar (factory set, field adjustable)

Key Engineering Advantages

✔ PP liner isolates water from metal — zero rust contamination, meets potable water standards
✔ Steel clench ring mechanically locks liner & diaphragm into the shell — no slippage over time
✔ Reinforced abrasion zones on both liner and diaphragm extend cycle life significantly
✔ O-ring sealed valve cap prevents air leakage at the inflation point
✔ Fully maintenance-free design — no bladder replacement, no steel corrosion concerns

✔ Air-water separation is absolute — consistent pre-charge retention over years of service

ET-LH — WHERE & HOW TO USE

Best-Fit Applications of ET-LH Series Horizontal Expansion Tanks (Polypropylene Liner) — 8L to 100L:

• Potable water booster systems in residential & commercial buildings

• Reverse osmosis / water treatment buffer tanks
• Food & beverage processing lines requiring non-metallic water contact
• Medical-grade water systems where purity matters
• Irrigation pressure stabilization in confined pump houses
• Solar thermal expansion compensation where high-temp PP liner performs

Installation Guide:

Step 1 — Position the tank horizontally on a level platform or wall-mount bracket

Step 2 — Verify and adjust pre-charge to 0.2 bar below pump cut-in pressure
Step 3 — Connect via flexible stainless steel braided hose to dampen vibration
Step 4 — Fit a ball valve between the tank and the plumbing for isolation
Step 5 — Annual check: recharge if pre-charge drops by 0.3 bar or more

Quick Selection by Volume:

→ ET-8LH / ET-18LH: Single-fixture or point-of-use systems
→ ET-24LH / ET-35LH: Standard homes (1–2 bathrooms)
→ ET-60LH / ET-80LH: Larger residences, light commercial, drip irrigation

→ ET-100LH: Multi-unit buildings, commercial booster packages

OEM / Custom Options

• Alternative diaphragm compounds (EPDM, natural rubber)
• Custom paint colors & logo silk-screening
• Packaging: plain carton, branded box, shrink-wrapped pallet
• Thread options: NPT, BSP, or bespoke adaptors
• Pressure gauge port fitting (optional)

Logistics & Payment

• Sample lead time: within 15 days of confirmation
• 50–500 pcs: 30 working days
• 500+ pcs: 45 working days
• FOB: Ningbo
• Terms: T/T

WHY SOURCE ET-LH FROM LEAD PUMP?

✦ Complete Range, One Source

Seven models from 8 to 100 liters sharing the same 1" SS connection and pre-charge spec. Mix any combination in a single container — fewer PO's, simpler logistics.

✦ Direct Factory Pricing

We operate the molding, fabrication, painting, and assembly lines in-house. No middlemen, no trade mark-ups. Ask for a raw cost breakdown — we're transparent.

✦ Tested Before Shipment

Every ET-LH Series Horizontal Expansion Tanks (Polypropylene Liner) — 8L to 100L passes a hydrostatic pressure test at 1.5× the rated max pressure. Test certificates accompany each order. Field failure rate: below 0.3%.


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