-28 -ol ((hot)) — Mpd-055

The part number MPD-055-28-OL typically refers to a specialized microwave component, specifically a phase shifter or similar control module. Based on standard industry nomenclature from manufacturers such as Marki Microwave or Microwave Development Labs (MDL), the alphanumeric string describes its electrical and physical configuration. Technical Breakdown of Part Number

MPD: Generally stands for "Microwave Phase Device" or "Microwave Phase Delay." It identifies the product family as a phase control component.

-055: Often indicates the specific frequency range or model series. For many components in this class, "055" may denote a center frequency or bandwidth around 5.5 GHz (C-band) or a specific revision within the manufacturer's series.

-28: Frequently identifies the interface size or physical housing. In microwave engineering, "28" is a common designation for WR-28 waveguide components (Ka-band, 26.5–40 GHz), or it may refer to a specific bit-depth (e.g., 2.8 degrees per step) in digital variants.

-OL: Typically stands for "Open Loop" or "Outline," indicating a specific control architecture or mechanical package style. Core Specifications

While exact specifications can vary by manufacturer, devices with this numbering typically share these characteristics: MPD-0226BH - Power Dividers & Combiners - Marki Microwave

At first glance, MPD-055-28-OL looks like a cryptic string from a high-stakes spy thriller or a secure government clearance code. In reality, it is

a highly specific industrial identifier for a chemical workhorse: Poly-G® 55-28 polyol

, an ethylene oxide-capped diol that serves as a fundamental "building block" for many of the flexible materials we use every day The Science Behind the Code

While the string might seem random, it represents a precise chemical configuration used by manufacturers like Monument Chemical . Here is what makes this substance unique: Molecular Architecture MPD-055 -28 -OL

: It has a nominal molecular weight of 4,000 and an ethylene oxide "cap". This cap isn't just for show; it yields a primary hydroxyl content of approximately 85%, which significantly boosts the chemical's reactivity when mixed with other substances. The "OL" Factor : The "OL" likely refers to its classification as a

—a type of alcohol containing multiple hydroxyl groups that is essential for producing high-quality polyurethanes. Physical Resilience

: In its raw form, it is a stable, colorless liquid that is non-volatile and non-corrosive. It is specifically engineered to create materials that require high elongation , softness, and extreme flexibility. Real-World Impact: Where is it?

You won't find a bottle of MPD-055-28-OL on a grocery shelf, but you are likely surrounded by the products it helps create. Because of its ability to produce urethanes with superior physical properties, it is a go-to ingredient for: High-End Cushioning

: Used in specialized foams that need to be soft yet resilient enough to snap back into shape. Flexible Sealants

: Found in industrial coatings that must stretch and contract without cracking. Performance Textiles

: Its high elongation properties make it ideal for flexible synthetic materials used in everything from automotive interiors to athletic gear. Handling the "Invisible" Hero

Despite its importance, MPD-055-28-OL is a sensitive chemical. It is hygroscopic

, meaning it acts like a sponge for atmospheric moisture. If left exposed to the air, it can absorb water, which can ruin its chemical reactivity and the quality of the final product. This is why it is typically shipped and stored under strict conditions to maintain its high purity. The part number MPD-055-28-OL typically refers to a

In the world of industrial chemistry, MPD-055-28-OL isn't just a part number—it's the secret to making the rigid world a little bit softer and a lot more flexible. safety data sheets for this polyol or see how it compares to other standard industrial diols Poly-G ® 55-28 - Monument Chemical

MPD-055 -28 -OL specific geological data from a historical mineral exploration project, specifically a diamond core drill hole at the (MP) project in Papua New Guinea Tolu Minerals Geological Context

(Exploration License EL 2662), which is currently 100% owned by Tolu Minerals Limited Project History

: The site underwent extensive exploration between 1968 and 2011, including the drilling of 82 diamond core (DD) holes. Drill Hole (MPD-055)

: This specific identifier represents the 55th hole drilled in the Mt Penck series. The suffix "-28" typically indicates a specific depth or sample interval, while "-OL" often signifies a particular geological unit or observation (such as "Overload" or "Outer Limit") within the assay. Tolu Minerals Mineral Characteristics Based on findings from the Independent Geologist Report for the area: Alteration : The zone is characterized by intense argillic and advanced argillic alteration Primary Minerals

: Ore shoots in this region typically consist of vuggy silica and form irregular pipes or veins composed primarily of quartz and pyrite Metals Identified

: Core samples from this drilling series were estimated for gold ( ), silver ( ), antimony, copper, lead, and zinc. Tolu Minerals assay results for gold and silver from this drill hole?

While the subject line "MPD-055 -28 -OL" may appear to be a cryptic code, it identifies a high-performance industrial component: the Sealmaster MPD-55 Gold Line High Base Pillow Block Bearing Go to product viewer dialog for this item.

. Specifically, this part is a medium-duty, 2-bolt pillow block ball bearing designed for demanding mechanical applications. Engineering and Durability Performance

The core of the MPD-55’s value lies in its material composition and protective features. It typically features a 52100 bearing steel insert housed within a powder-coated epoxy cast iron casing. This combination provides a robust defense against corrosion and physical wear, making it a staple in industrial environments like HVAC systems and manufacturing plants. The "Gold Line" series is known for its high-performance standards, often utilized where reliability is non-negotiable. Technical Precision Go to product viewer dialog for this item.

is characterized by several specific mechanical innovations:

Locking Mechanism: It utilizes a double setscrew locking device with diamond-faceted setscrews, ensuring a secure grip on the shaft even under high vibration.

Lubrication Management: The unit includes a unique land-riding retainer design that allows for 360° grease circulation. This ensures the rolling elements remain consistently lubricated, extending the operational life of the bearing.

Sealing: To protect against contaminants, it often employs a felt labyrinth seal and flinger, which are particularly effective in dusty or dirty environments. Performance Specifications

The "055" in the part number corresponds to the bore diameter, which is 3-7/16 inches. In a medium-duty configuration, this bearing is rated for significant loads, with a dynamic load capacity exceeding 21,000 lbs. It is engineered to operate across a wide temperature range, typically from -40∘Fnegative 40 raised to the composed with power F 200∘F200 raised to the composed with power F , and can handle speeds up to 2800 RPM. In summary, the Sealmaster MPD-55 Go to product viewer dialog for this item.

represents a pinnacle of industrial bearing design, balancing heavy-duty strength with precise engineering to facilitate smooth, reliable power transmission in modern machinery. 52100 Bearing Steel, Black Oxided - Double Setscrew Lock

It is important to clarify at the outset that MPD-055-28-OL is not a widely recognized standard, consumer product, or commercial part number within major public databases as of this writing. Depending on the context, this string of characters could belong to one of several niche domains: aerospace fastener specs, obsolete military procurement codes, internal industrial inventory tags, or even a mis-typed reference for a scientific compound.

However, due to the structured format ([Prefix]-[3 digits]-[2 digits]-[Suffix]), this article will analyze the most probable high-value interpretations, focusing on engineering, manufacturing, and technical procurement. By the end, you will have a clear action plan to identify the exact component or specification this code represents.

Performance

• Efficiency: likely high for the class if designed for power management; efficiency varies with load and switching frequency (if applicable).
• Load handling: rated for continuous operation within manufacturer-specified current limit; expect reduced continuous rating unless external cooling is provided.
• Noise and EMI: performance depends on internal filtering; may require additional external filtering for sensitive applications.

Product review — MPD-055 -28 -OL

2. Specifications (assumed template — verify with your datasheet)

• Physical:
  • Dimensions: 55 mm (nominal) × 28 mm (nominal) × thickness varies
  • Weight: ~50–250 g (product-dependent)
• Electrical:
  • Supply voltage: 12–48 V DC (confirm)
  • Operating current: 0.1–5 A (nominal)
  • Connector type: multi-pin header / Molex / screw terminal
  • Signal interfaces: UART / I2C / SPI / analog / PWM (device-specific)
• Environmental:
  • Operating temperature: -20 °C to +70 °C
  • Storage temperature: -40 °C to +85 °C
  • Ingress protection: IP20–IP67 (device-specific)
• Performance:
  • Accuracy, resolution, or output power — check datasheet
• Compliance:
  • Safety/EMC standards — check product label/datasheet

Step 2 – Examine the physical part (if you have one)

Look for additional markings – heat lot codes, manufacturer logos (e.g., SPS, Alcoa, Deutsch, Parker). Use a magnifying glass. OL might be followed by “-CD” (cadmium) or “-NI” (nickel).

Test and validation checklist before deployment

1. Obtain and review official datasheet and application notes (pinout, absolute maximums, derating curves).
2. Verify continuous and peak current ratings under your expected ambient and cooling conditions.
3. Run thermal simulations and measure case/PCB temperatures under expected load.
4. Validate protection behavior (short-circuit, overcurrent, thermal shutdown) in controlled tests.
5. Check EMI/noise levels in your system and add filtering if necessary.
6. Confirm mechanical mounting and clearance in the final enclosure.
7. Confirm regulatory and safety certifications required for your market.