Dowsil XIAMETER PMX-561 for Transformer Insulation Cooling:
Polydimethylsiloxane Liquid
Dowsil PMX-561 (also known as XIAMETER PMX-561 Transformer Liquid)
is a Polydimethylsiloxane electrical insulating liquid introduced
by Dow Chemical. It is a non-halogenated, additive-free,
non-hazardous class transparent silicone fluid.
| Parameter | Unit | Value (Typical) |
|---|
| Appearance | - | Clear, Transparent Liquid |
| Density at 25°C (77°F) | kg/dm3 | 0.96 |
| Viscosity at 25°C (77°F) | mm2/s (cSt) | 50 |
| Water Content | ppm | 30 |
| Specific Heat | kJ/kg.K | 1.51 |
| Thermal Conductivity | W/(m.K) | 0.151 |
| Refractive Index at 25°C (77°F) | - | 1.404 |
| Dielectric Breakdown Voltage (IEC 156) | kV | 50 |
| Dielectric Constant at 25°C, 50Hz | - | 2.7 |
| Dissipation Factor at 25°C, 50Hz | - | 0.0001 |
| Volume Resistivity at 25°C | ohm.cm | 1.0 x 10^14 |
| Flash Point (Open Cup) | °C | >300 |
| Fire Point (Open Cup) | °C | 370 (698°F) |
This product is primarily designed as a cooling and insulating
medium for transformers and other electrical equipment, complying
with international standards such as IEC 60836(Type T-1 Silicone)
and ASTM D 4652-92. It maintains good electrical properties and
operational capability over a wide temperature range, aimed at
replacing traditional mineral oils to enhance equipment safety.
PMX-561 exhibits high thermal stability, oxidation resistance, and
excellent fire-resistant characteristics, with an open cup fire
point up to 370°C and a lower heat release rate than other Class K
insulating liquids, featuring non-sludging properties. Furthermore,
this material is compatible with various solid electrical
insulating materials, with prominent environmental attributes (low
net calorific value), classifying it as an intrinsically safe
insulating fluid.
In addition to conventional oil-immersed high-voltage power
transformers, due to its high fire point and enhanced safety,
Dowsil PMX-561 is often applied in scenarios with strict fire
safety requirements, such as urban rail transit (railway tunnels)
traction transformers, underground substations, substations inside
high-rise buildings, offshore platform equipment, and certain
high-voltage switches and power capacitors.
FAQ
1. Who are we?
We are Shenzhen Huazhisheng New Material Technology Co., Ltd., a
professional industrial adhesives and sealants supplier based in
China since 2018. we serve global markets: Mainland China (60%),
Southeast Asia (20%), North America (10%), and Europe (10%).
2. What products do you offer?
we supply high-performance adhesives and sealants from global
leaders including:
Cemedine, Dow Corning, Shin-Etsu, Araldite, and Momentive,etc.
3. How do you guarantee product quality?
Quality assurance through:
Mandatory pre-production samples approval
Final inspection by QC team before shipment
International certifications: SGS, UL, FDA, RoHS, REACH
4. Why choose us over other suppliers?
Reliable Supply:Authentic products from top manufacturers
Expert Support:Technical guidance for product selection
Global Compliance:Certifications meeting target market standards
Efficient Service:Customized solutions & professional support
5. What services do you provide?
Delivery:EXW/FOB/CIF
Payment:USD/EUR/CNY/HKD via T/T, L/C
Support:Technical consultation & logistics coordination
