PALL Hydraulic Filter Replacement – Pleated Glass Fiber Media for High-Precision Industrial Filtration

Product Update: Aite PALL HC/UE Series Replacement Filter Element

1. Product Overview

Aite PALL HC/UE Series Replacement Filter Element is engineered as a direct, fully interchangeable alternative for

 PALL HC/UE series hydraulic filters, specifically designed for the demanding environments of steel mills and thermal power plants.

 From hot rolling mills and continuous casting lines to turbine lubrication and electro-hydraulic control systems, these operations

 depend on reliable fluid power. At the heart of these systems lies a critical yet often overlooked component – the hydraulic filter

 element.

Aite PALL HC/UE Series Replacement Filter Element directly addresses the risks of contaminated hydraulic fluid – accelerated 

servo valve wear, pump damage, unplanned downtime, and costly production losses. Utilizing advanced multi-layer gradient 

glass fiber media, rugged all-metal support construction, and precise dimensional compliance, this product delivers reliable

 filtration performance under high temperatures, abrasive contaminants, and continuous operation. As an independent

 aftermarket manufacturer, we offer these replacement elements at a fraction of the cost of genuine PALL parts,

 without compromising efficiency, service life, or system compatibility.

2. The Challenges of Steel & Power Plant Hydraulic Systems

Hydraulic systems in steel and power generation facilities operate under some of the most severe industrial conditions. 

Aite PALL HC/UE Series Replacement Filter Element is purpose-built to overcome these specific challenges:

· Elevated Operating Temperatures: Continuous oil temperatures in hot rolling mills and power plant EH systems typically range 

from 90°C to 120°C, with thermal spikes reaching 130–150°C. Standard filter media may experience resin degradation and fiber

 embrittlement under these conditions – leading to premature failure and contamination bypass.

· Complex Contaminant Profiles: Hydraulic oil accumulates iron oxide particles, metal wear debris, varnish, oil sludge, 

sulfide byproducts, and rust fragments. This mixture of abrasive, adhesive, and corrosive contaminants demands robust filter

 media structure and chemistry.

· Pressure Fluctuations and Flow Shocks: Cyclic pressure variations and load-induced surges create mechanical stress that 

can collapse weak media, deform pleats, and compromise seals.

· Stringent Cleanliness Requirements: Modern hydraulic systems with servo valves and proportional valves require oil cleanliness

 maintained to ISO 4406 standards. Even brief excursions above recommended levels can cause scoring, sticking, and loss of 

positioning accuracy.

Conventional single-layer paper elements or low-grade glass fiber media cannot reliably withstand these conditions. 

Aite PALL HC/UE Series Replacement Filter Element – with its advanced multi-layer composite media, high-temperature 

accessories, and precision construction – delivers the durability and performance required in these severe service applications.

3. Advanced Media Technology – Multi-Layer Gradient Glass Fiber

Aite PALL HC/UE Series Replacement Filter Element utilizes multi-layer gradient borosilicate glass fiber media, 

engineered specifically for high-temperature, high-contaminant industrial applications. The gradient pore structure operates

 on a stepwise filtration principle:

· Outer coarse fiber layer captures large metal debris and particulate contaminants, preventing rapid surface blinding.

· Intermediate layer adsorbs oil sludge, oxidized colloids, and fine suspended material.

· Inner dense fiber layer intercepts micron and sub-micron particles, maintaining required filtration precision throughout the 

service life.

This layered architecture distributes contaminant loading across the entire media depth rather than concentrating it on the

 surface. As a result, Aite PALL HC/UE Series Replacement Filter Element achieves higher dirt-holding capacity, lower initial

 differential pressure, and extended service intervals compared to uniform pore structure media. All media formulations comply 

with ISO 16889 multipass filtration test standards and ISO 3724 flow fatigue test requirements.

4. Temperature-Graded Selection – Matching Media to Working Conditions

Recognizing that steel and power plant applications cover a wide thermal range, Aite PALL HC/UE Series Replacement Filter

 Element is offered in three temperature-graded media options:

Grade Temperature Range Core Features Typical Applications

Grade 1 Continuous ≤100°C, Peak ≤105°C 3-layer homogeneous fiber, NBR seals, galvanized steel core Cold rolling auxiliary 

stations, low-load lubrication circuits

Grade 2 Continuous 100–120°C, Peak ≤130°C (≤30 min) 4-layer thickened gradient, FKM seals, 304 stainless steel core Hot rolling 

mills, conventional power plant EH systems (~90% of applications)

Grade 3 Continuous ≤140°C, Peak ≤150°C (≤20 min) PTFE-coated high-temp fiber, full-fluorine FKM seals, 316L stainless steel 

core Furnace-front cylinders, boiler main actuator stations

Aite PALL HC/UE Series Replacement Filter Element in Grade 2 represents the mainstream selection for approximately 90% of hot

 rolling mill and conventional power plant EH applications. For the most extreme conditions, Grade 3 delivers proven performance after 1200 hours of immersion in 140°C oxidized hydraulic oil, with fiber strength retention exceeding 96%.

5. Complete High-Temperature Accessory Matching

A filter element is only as reliable as its weakest component. Aite PALL HC/UE Series Replacement Filter Element ensures all 

accessory components are matched to the selected media grade:

· Sealing Systems: NBR for Grade 1 (≤100°C); standard FKM for Grade 2 (-20°C to 120°C, peak 130°C); modified full-fluorine FKM 

for Grade 3 (-20°C to 140°C, peak 150°C).

· End-Cap Bonding: Polyurethane adhesives for Grade 1; high-temperature fluorine-containing epoxy hot-melt adhesives for

 Grades 2 and 3 (continuous resistance to 145°C, peel strength >50 N/cm).

· Support Cores: Galvanized carbon steel for Grade 1; 304 stainless steel (1.2mm min wall thickness) for Grade 2; 316L 

molybdenum-bearing stainless steel for Grade 3 to resist chloride pitting.

· Bypass Valves: Stainless steel spring cores with rubber gaskets temperature-matched to seal grade, maintaining stable

 opening pressure (3bar ±10%) fully aligned with original PALL parameters.

6. Application Selection Guidelines

To assist plant engineers in selecting the correct Aite PALL HC/UE Series Replacement Filter Element, the following guidelines 

apply:

· Cold Rolling Auxiliary Stations (oil temperature ≤100°C, peaks ≤105°C): Grade 1 media with NBR seals. Install heat insulation

 baffles around filter housings and drain water from tank bottoms regularly.

· Hot Rolling Roughing/Finishing Lines & Conventional Power Plant EH Stations (100–120°C continuous, peaks 125–130°C <30 min): Grade 2 media with standard FKM seals. Optimize cooling circulation to prevent operation above 120°C for >4 hours; record differential pressure every shift.

· Furnace-Front Heavy-Load Cylinders & Boiler Main Actuator Stations (120–140°C continuous, peaks 140–150°C): Grade 3 

ultra-high temperature media with modified FKM seals and 316L stainless steel cores. Install auxiliary cooling heat exchangers 

and shorten replacement intervals by 30% compared to medium-thermal-load applications.

7. Frequently Asked Questions (FAQ)

Q1: What is the direct replacement compatibility of this filter element?

A: Aite PALL HC/UE Series Replacement Filter Element is engineered as a fully interchangeable replacement for PALL HC/UE series

 filters, maintaining identical dimensional and interface specifications – outer diameter, inner hole, height, and thread size – to 

enable direct drop-in installation without any housing modifications or adapters.

Q2: How does the multi-layer gradient media improve filtration performance?

A: The outer coarse layer captures large particulates, the intermediate layer adsorbs oil sludge and oxide colloids, and the inner 

dense layer intercepts micron-level fines. This distributes contaminant loading throughout the media depth, delivering higher 

dirt-holding capacity, lower initial pressure drop, and extended service intervals compared to single-layer designs.

Q3: Which temperature grade should I choose for my application?

A: Grade 1 (up to 100°C) suits cold rolling auxiliary stations; Grade 2 (100–120°C) covers approximately 90% of hot rolling mills

 and conventional power plant EH systems; Grade 3 (120–140°C) is reserved for furnace-front heavy cylinders and boiler actuator 

stations with extreme thermal spikes up to 150°C.

Q4: What seals and accessories are provided for high-temperature operation?

A: Seals are temperature-matched to each media grade – NBR for Grade 1, standard FKM for Grade 2, and modified full-fluorine

 FKM for Grade 3 – complemented by stainless steel support cores (304 or 316L), heat-resistant end-cap adhesives, and bypass

 valves with opening pressure fully aligned to original PALL parameters.

Q5: How does this replacement element compare to genuine PALL in terms of quality and cost?

A: Each element undergoes stringent quality control and complies with ISO 16889 and ISO 3724 standards, delivering equivalent 

filtration efficiency, service life, and system compatibility – while offered at 40%–60% lower cost than genuine parts, significantly

 reducing operational expenditures without compromising reliability.

Q6: What maintenance practices are recommended to maximize service life?

A: Monitor differential pressure per shift, optimize cooling circulation to avoid prolonged operation above rated temperatures, 

drain water from tank bottoms regularly, and for Grade 3 extreme applications, shorten replacement intervals by 30% compared

 to medium-thermal-load conditions to account for accelerated media aging.

Q7: Can I get samples for testing before placing bulk orders?

A: Yes. We support paid sample orders (1–5 pieces) with a production lead time of approximately 5–7 days. After sample testing

 approval, the sample cost can be fully deducted from your first bulk order.

Q8: Do you provide export documentation for customs clearance?

A: Absolutely. We supply EN 10204 material certificates, ISO 16889 filtration performance test reports, and factory inspection

 records with every shipment – ensuring smooth customs clearance in the EU, Southeast Asia, the Middle East, and beyond.

Aite PALL HC/UE Series Replacement Filter Element – engineered for extreme conditions, priced for everyday value. Contact us 

today for a free technical matching drawing and competitive quotation within 24 hours.