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SWAGELOK 990.TB-MWP-2500 Mini Diaphragm Seal Gauge Nos 990.TB/MWP-2500 316L-SST 200-PSI

316l-sst Swagelok 990.tb/mwp-2500 Mini-diaphragm Seal 200-psi Gauge Nos

( Brand: Swagelok ), ( Manufacturer Part Number: 990.TB/MWP-2500 ), ( Part Type: Seal Gauge ), ( Face Diameter: 2.5 In ), ( Connection Diameter: 1/4 In ), ( Mounting Position: Side/bottom Mount ), ( Country Of Origin: United States ), ( Maximum Pressure: 200 Psi )

Review SWAGELOK 990.tb/mwp-2500 Mini diaphragm Seal 200-psi Gauge Nos

The **Swagelok 990.TB/MWP-2500 Mini-Diaphragm Seal Gauge (316L Stainless Steel, 200 PSI)** is a precision-engineered, compact pressure-measuring instrument designed for demanding industrial, laboratory, and process control applications where space is limited and reliability is paramount. This high-performance gauge features Swagelok s proprietary **Mini-Diaphragm Seal (MWP-2500) technology**, which isolates the internal gauge mechanism from the process media, eliminating the risk of contamination, corrosion, or damage from harsh fluids, abrasive particles, or aggressive chemicals. The **316L stainless steel construction** ensures superior corrosion resistance, making it ideal for use in environments exposed to saline solutions, acids, alkalis, or high-purity applications where even trace metal leaching must be avoided. With a **200 PSI (13.8 bar) maximum working pressure**, this gauge is well-suited for moderate to high-pressure systems in industries such as pharmaceuticals, semiconductor manufacturing, food and beverage processing, and specialized HVAC or refrigeration setups.

The **990.TB series** combines Swagelok s reputation for durability with a **space-saving design**, allowing for installation in tight or confined spaces where traditional gauges would be impractical. The **diaphragm seal** acts as a robust barrier, preventing process fluids from entering the gauge housing while maintaining accurate pressure readings through a sealed, non-contaminating interface. This design not only extends the gauge s operational lifespan but also simplifies maintenance, as the internal mechanism can be serviced or replaced without exposing the system to potential leaks or cross-contamination. The **316L stainless steel body and moving parts** further enhance its suitability for applications requiring compliance with stringent hygiene or cleanroom standards, such as those found in biopharmaceutical or medical device manufacturing.

Beyond its functional advantages, the **990.TB/MWP-2500 gauge** incorporates Swagelok s signature **precision engineering**, ensuring consistent accuracy and repeatability across a wide range of pressures. Its **compact yet robust construction** includes a **threaded -inch NPT process connection**, compatible with standard Swagelok fittings, which streamlines integration into existing piping systems. The gauge s **durable glass or polycarbonate window** provides clear, unobstructed visibility of the pressure reading, while the **sealed housing** protects against environmental factors like dust, moisture, or temperature fluctuations, making it a reliable choice for both indoor and outdoor applications. Whether used in a laboratory setting for precise experimental control or in an industrial process to monitor critical system parameters, this gauge delivers the **accuracy, corrosion resistance, and long-term reliability** expected from Swagelok s premium instrumentation.

**Pros and Cons of buying a Swagelok 990.TB/MWP-2500 Mini-Diaphragm Seal Gauge (316L-SS, 200 PSI)**

### **Pros**

1. **High-Quality Construction** The gauge is made from **316L stainless steel**, a corrosion-resistant material ideal for harsh environments, including chemical processing, pharmaceuticals, and food/beverage industries. This ensures durability and longevity, even in aggressive media.

2. **Miniature Design** The compact size (mini-diaphragm seal) allows for installation in tight or space-constrained systems without sacrificing functionality. This is particularly useful in retrofitting existing setups or applications where space is limited.

3. **Pressure Range Suitability** The **200 PSI (13.8 bar) rating** is versatile for many industrial applications, including HVAC, water treatment, and low-to-moderate-pressure gas/liquid systems. It strikes a balance between safety and practicality for non-critical or secondary systems.

4. **Diaphragm Seal Protection** The diaphragm seal isolates the process fluid from the gauge mechanism, preventing contamination of the gauge and extending its service life. This is crucial in applications where the medium could damage or corrode standard gauges.

5. **Compatibility with Swagelok Fittings** As part of the Swagelok ecosystem, this gauge integrates seamlessly with their **SS-400 or SS-800 tubing systems**, reducing the need for additional adapters or conversions. This simplifies installation and maintenance.

6. **Reliability and Brand Reputation** Swagelok is a well-established brand known for precision engineering and consistent performance in industrial settings. The gauge is likely to meet or exceed industry standards for accuracy and durability.

7. **Easy Installation and Maintenance** The design is straightforward, with standard Swagelok fittings that can be installed using basic tools. The diaphragm seal can be replaced if damaged, reducing long-term costs.

8. **Wide Application Range** Suitable for **liquids, gases, and steam** (within its pressure limits), making it adaptable to various processes, including water systems, pneumatic controls, and laboratory setups.

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### **Cons**

1. **Limited Pressure Rating** The **200 PSI maximum** may be insufficient for high-pressure applications (e.g., oil/gas refining, heavy-duty hydraulic systems, or high-temperature steam). Users requiring higher pressures would need a different model.

2. **Cost** Swagelok products are premium-priced due to their quality and precision. For basic or low-budget applications, cheaper alternatives (e.g., standard bourdon tube gauges) might suffice without the need for a sealed diaphragm model.

3. **Diaphragm Seal Maintenance** While the diaphragm seal protects the gauge, it introduces an additional component that can fail over time. Replacement diaphragms may need to be sourced separately, adding to maintenance costs.

4. **Potential for Overkill** If the application does not involve **corrosive or abrasive fluids**, a standard gauge without a diaphragm seal might be adequate, reducing unnecessary complexity and expense.

5. **Calibration Requirements** Like all precision instruments, this gauge may require periodic calibration to ensure accuracy, which could involve downtime or external services.

6. **Size Limitations** The "mini" designation means the gauge face may be smaller than standard models, which could make reading difficult in low-light or high-vibration environments.

7. **Compatibility with Non-Swagelok Systems** If the system uses non-Swagelok fittings (e.g., ANSI, JIS, or custom connections), additional adapters may be needed, increasing installation complexity.

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### **Conclusion**

The **Swagelok 990.TB/MWP-2500 Mini-Diaphragm Seal Gauge (316L-SS, 200 PSI)** is an excellent choice for applications requiring **corrosion resistance, compact design, and protection against contaminated fluids**. Its **Swagelok compatibility, durability, and reliability** make it ideal for industries where precision and longevity are critical such as **pharmaceuticals, food processing, chemical handling, and laboratory settings**.

However, if the application involves **high pressures, non-corrosive media, or budget constraints**, a standard gauge may be more appropriate. The **diaphragm seal adds value but also complexity**, so weigh whether the protection justifies the cost.

### **Recommendation**

**Buy this gauge if:**

- You need a **corrosion-resistant, compact solution** for liquids or gases up to 200 PSI.

- Your system uses **Swagelok fittings** or can accommodate them.

- The application involves **potentially damaging fluids** (e.g., acids, solvents, or abrasive media).

- Space constraints require a smaller gauge.

**Avoid this gauge if:**

- Your system requires **higher pressures** (e.g., > 300 PSI).

- The medium is **non-corrosive and clean**, making a standard gauge sufficient.

- Cost is a major concern, and a lower-end alternative would work.

- You lack access to **Swagelok fittings or diaphragm seal replacements**.

For most **industrial, laboratory, or process control applications where corrosion protection and compactness are priorities**, this gauge is a **strong, long-term investment**. However, always verify compatibility with your specific system before purchasing.

Details:

SECTION 2023 R10-G11 OOO MD. Mistakes, however, do happen and items sometimes get damaged during transit. We greatly appreciate your patronage of our small American business. SWAGELOK, MINI-DIAPHRAGM SEAL, 990.TB/MWP-25 316L-SST, 200-PSI GAUGE, NOS.

part #: 990tbmwp2500 price

  • $145.00

specifications pressureswitchiz:

  • brand: Swagelok
  • mpn: 990.tb/mwp-2500
  • part type: Seal Gauge
  • face diameter: 2.5 In
  • connection diameter: 1/4 In
  • mounting position: Side/bottom Mount
  • country of origin: United States
  • maximum pressure: 200 Psi

seller pressureswitchiz:

  • city: Broussard, Louisiana
  • # reviews: 1621
  • rating: 99.9%

returns pressureswitchiz:

  • policy: Returns Accepted
  • method: Money back
  • time: 30 Days
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general pressureswitchiz:

  • Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Air Pressure Gauges
  • condition: New Open box

shipping pressureswitchiz:

  • transit: 2-6 Days
  • class: Standard, One-day
  • service: UPS Ground, UPS Next Day Air
  • type: Calculated
  • carrier: UPS
  • cost: $25.44

offer pressureswitchiz:

  • availability: In Stock
  • started: April 28, 2026
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part type: seal gauge, face diameter: 2.5 in, connection diameter: 1/4 in, mounting position: side/bottom mount, country of origin: united states, maximum pressure: 200 psi,
category: business & industrial > hydraulics, pneumatics, pumps plumbing > air pressure gauges, sku: 18250587464512813,
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  • New – Open box. Offer #1 priced at $145.00 + $25.44 shipping estimate = $170.44* total. SWAGELOK, MINI-DIAPHRAGM SEAL, 990.+$25.44 shipping

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