Eaton Series DA 636 Pressure Filter
NPS 3" CLASS 150-300 PSI
Product Description
The Eaton Series DA 636 is a pressure filter designed for changeover applications, compliant with ASME-Code. It offers a working pressure up to 40 bar and can absorb pressure peaks with a sufficient safety margin. A key feature is the changeover ball valve, allowing seamless switching between two filter housings from the dirty to the clean filter side without interrupting operation. The filter element is constructed with star-shaped, pleated filter material supported by a perforated core tube and bonded with high-quality adhesive, with flow direction from outside to inside. Eaton filter elements are recognized for their high intrinsic stability, excellent filtration capability, high dirt-retaining capacity, and long service life, suitable for various hydraulic fluids and oils.
Type Index and Ordering Information
The following index details the configuration options for the DA 636 series filter. An example ordering code is DA. 636. 10VG. 30. E. P. -. FS. A. -. -. IS21. AB. OE.
| Index | Parameter | Description |
|---|---|---|
| 1 | Series | DA = Pressure filter, changeover, acc. to ASME-Code |
| 2 | Nominal Size | 636 |
| 3 | Filter Material |
|
| 4 | Filter Element Collapse Rating | 30 = Δp 30 bar |
| 5 | Filter Element Design | E = Single-end open |
| 6 | Sealing Material |
|
| 7 | Filter Element Specification |
|
| 8 | Process Connection |
|
| 9 | Process Connection Size | A = 3" |
| 10 | Air Bleeding/Drain Dirt Side |
|
| 11 | Filter Housing Specification |
|
| 12 | Specification Pressure Vessel |
|
| 13 | Shut-off |
|
| 14 | Clogging Indicator or Clogging Sensor |
|
1) Sealing surface Rz = 160 µm (not finer than 40 µm)
2) Sealing surface Rz = 16 µm
Filter Element Ordering Example: 01NLM. 636. 10VG. 30. E. P. -
| Index | Parameter | Description |
|---|---|---|
| 1 | Series | 01NLM = Standard filter element according to DIN 24550, T3 with hex nut |
| 2 | Nominal Size | 636 |
| 3-7 | See Type Index - Complete Filter |
Accessories:
- SAE-counter flanges (see sheet-no. 1652)
- Drain- and bleeder connection (see sheet-no. 1659)
Technical Data
| Parameter | Value |
|---|---|
| Operating Temperature | -10°C to +100°C |
| Operating Medium | Mineral oil, other media on request |
| Max. Operating Pressure (Pressure Vessel) | 40 bar |
| Test Pressure (ASME VIII Div. 1) | 1.3 x operating pressure = 52 bar |
| Test Pressure (API 614, Chapter 1) | 1.5 x operating pressure = 60 bar |
| Process Connection System | SAE-flange 3000 PSI or ANSI-flange B16.5 CLASS 150/300 PSI |
| Housing Material | Carbon steel (ASTM) (see sheet-no. 69578) |
| Sealing Material | Nitrile (NBR) or Viton (FPM), other materials on request |
| Installation Position | Vertical |
| Bleeder Connection | NPT ½" or ANSI ¾" CLASS 150/300 PSI |
| Drain Connection Dirt Side | NPT ½" or ANSI ¾" CLASS 150/300 PSI |
| Drain Connection Clean Side | NPT ½" |
| Volume Tank | 2 x 6.0 l |
| Operating Pressure Adapter Flanges | According to B16.5 CLASS 150 PSI (FA11/FA12 max. 16 bar) According to B16.5 CLASS 300 PSI (FA1/FA2 max. 40 bar) |
Classified under the Pressure Equipment Directive 2014/68/EU for mineral oil (fluid group 2), Article 4, Para. 3. Classified under ATEX Directive 2014/34/EU according to specific application (see questionnaire sheet-no. 34279-4).
Diagram Description
The main diagram illustrates the Series DA 636 Pressure Filter assembly. It shows two filter housings connected by a changeover valve. Key connections are labeled:
- A: Process inlet (SAE 3" 3000PSI)
- B: Process outlet (SAE 3" 3000 PSI)
- C1/C2: Air bleeding (NPT ½")
- D1/D2: Drain, dirt side (NPT ½")
- E1/E2: Drain, clean side (NPT ½")
- F1: Measuring connection, dirt side (G 1¼)
- F2: Measuring connection, clean side (G 1¼)
- G1/G2: Air bleeding (NPT ½")
- H1/H2: Drain bottom (NPT ½")
The filter operates in two positions: Position I for Filter 1 and Position II for Filter 2. A note indicates that connection for potential equalization is available for explosive areas. The switch lever can be optionally moved to the backside of the changeover valve.
Weight: Approximately 170 kg.
Dimensions: Provided in mm. Designs and performance values are subject to change.
Pressure Drop Flow Curves
Filter Calculation/Sizing: The total pressure drop (Δp assembly) is the sum of the housing pressure drop (Δp housing) and the element pressure drop (Δp element). The formula for element pressure drop is:
Δp element (mbar) = Q (l/min) × (MSK value) × (Density / 0.876 kg/dm³) × (Viscosity / 30 mm²/s)
Eaton provides a Filter Selection tool online at www.eaton.com/hydraulic-filter-evaluation for ease of calculation.
Material Gradient Coefficients (MSK) for Filter Elements: These coefficients (in mbar/(l/min)) are based on mineral oil (HLP) with a density of 0.876 kg/dm³ and a kinematic viscosity of 30 mm²/s. Pressure drop is proportional to changes in viscosity and density.
| DA 636 | 3VG | 6VG | 10VG | 16VG | 25VG | 10G | 25G | 40G | 80G | 10 API | 25 API |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.436 | 0.303 | 0.194 | 0.169 | 0.115 | 0.0191 | 0.0142 | 0.0132 | 0.0091 | 0.099 | 0.045 |
Δp=f(Q) – Characteristic according ISO 3968: The graph illustrates the pressure drop characteristics for the DA 636 Housing with mineral oil (HLP) at a density of 0.876 kg/dm³. Pressure drop is proportional to density. The graph shows pressure drop (Ap in bar) on the y-axis versus flow rate (Q in l/min) on the x-axis, with curves for 30 mm²/s and 100 mm²/s kinematic viscosity.
Symbols
The following symbols are used to denote filter configurations:
- Without accessories
- With shut-off block
- With electric indicator (e.g., AE30/AE40)
- With visual-electric indicator (e.g., AE50/AE62, AE70/AE80/AE90)
- With visual indicator (e.g., AOR/AOC/OP)
- With electronic sensor (e.g., VS5)
Spare Parts
| Item | Qty. | Designation | Dimension | Article-No. |
|---|---|---|---|---|
| 2 | 1 | Gaskets kit filter housing | - | - |
| 2.1 | 2 | O-ring | 120 x 3.5 | 305146 (NBR) / 305202 (FPM) |
| 2.2 | 2 | O-ring | 120 x 3.5 | 305146 (NBR) / 305202 (FPM) |
| 2.3 | 2 | O-ring | 85 x 4 | 305685 (NBR) / 310285 (FPM) |
| 2.4 | 4 | O-ring | 24.99 x 3.53 | 304381 (NBR) / 305784 (FPM) |
| 3 | 1 | Gasket kit of switching over consisting of: | DN80 (3") | 354246 (NBR) / 354249 (FPM) |
| 3.1 | 4 | O-ring | 98 x 4 | - |
| 3.2 | 4 | O-ring | 110.72 x 3.53 | - |
| 3.3 | 4 | Gasket ring | DN80 | - |
| 3.4 | 4 | O-ring | 34 x 3.5 | - |
| 3.5 | 2 | Support ring | 40 x 34.4 x 5 | - |
| 3.6 | 4 | O-ring | 74 x 3.5 | - |
| 3.7 | 4 | O-ring | 10 x 2 | - |
Test Methods
Filter elements are tested according to the following ISO standards:
- ISO 2941: Verification of collapse/burst resistance
- ISO 2942: Verification of fabrication integrity
- ISO 2943: Verification of material compatibility with fluids
- ISO 3723: Method for end load test
- ISO 3724: Verification of flow fatigue characteristics
- ISO 3968: Evaluation of pressure drop versus flow characteristics
- ISO 16889: Multi-pass method for evaluating filtration performance
Contact Information
For more information, please email us at filtration@eaton.com or visit www.eaton.com/filtration.
Eaton Global Contact Information:
- North America: 18684 Lake Drive East, Chanhassen, MN 55317. Toll Free: +1 800-656-3344 (North America only). Tel: +1 732-212-4700
- Europe/Africa/Middle East: Auf der Heide 2, 53947 Nettersheim, Germany. Tel: +49 2486 809-0. Friedensstraße 41, 68804 Altlußheim, Germany. Tel: +49 6205 2094-0. An den Nahewiesen 24, 55450 Langenlonsheim, Germany. Tel: +49 6704 204-0
- Greater China: No. 7, Lane 280, Linhong Road, Changning District, 200335 Shanghai, P.R. China. Tel: +86 21 2899-3687
- Asia-Pacific: 100G Pasir Panjang Road, #07-08 Interlocal Centre, Singapore 118523. Tel: +65 6825-1620
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