Precision in Harsh Environments: YK-M4 Threaded Diaphragm Pressure
Gauge
The YK-M4 Diaphragm Pressure Gauge is a highly specialized
instrument designed for measuring the pressure of challenging media
that would damage or clog a standard pressure gauge. It employs an
indirect measurement structure, where the process medium acts upon
a flexible, corrosion-resistant diaphragm. This diaphragm then
transmits the pressure hydraulically to the internal measuring
mechanism of the gauge (typically a Bourdon tube system), which is
filled with a neutral fluid. This critical separation ensures that
the sensitive movement of the gauge is completely isolated from the
process medium.
This design makes it the ideal solution for applications involving
highly viscous, corrosive, easily crystallized, or high-temperature
media. By selecting the appropriate diaphragm and seal materials,
the gauge can be customized to withstand aggressive chemical
environments and harsh operational conditions, ensuring long-term
accuracy and reliability. Available in various dial sizes and
connection types, it offers a robust and versatile pressure
measurement solution for demanding industrial processes.
Technical Specifications
The key technical parameters of the YK-M4 Diaphragm Pressure Gauge
are summarized in the table below:
| Parameter | Specifications |
|---|
| Accuracy Class | 1.0 ; 1.6 ; 2.5 |
| Measuring Range | 0 ~ 0.1 MPa to 0 ~ 160 MPa |
| Diaphragm Material | OCr17Ni12Mo2 (316), Monel (Cu30Ni70), Hastelloy (H276C), Tantalum
(Ta), Fluoroplastic (F4) |
| Flange Material | Stainless Steel (316), Plastic-Lined Stainless Steel (316 + F4) |
| Sealing Gasket Material | Nitrile Rubber, Fluorine Rubber, Silicone Rubber, Fluoroplastic |
| Thread Connection | M20 * 1.5, G3/8", G1/2" (Customizable) |
| Dial Size (DN) | 60 mm, 100 mm, 150 mm |
| Temperature | Ambient & Medium (Standard): -25 ~ +55 °C
Medium (High-Temp Type): 0 ~ 600 °C |
| Working Pressure | Static Load: Up to 3/4 of scale max
Alternating Load: Up to 2/3 of scale max |
Applicable Scenarios
The primary strength of the diaphragm pressure gauge lies in its
ability to handle difficult media that are problematic for
conventional gauges. Its typical application scenarios include:
Corrosive Media: In chemical processing, petrochemical, and pharmaceutical
industries, it reliably measures the pressure of acids, alkalis,
and other aggressive chemicals. The use of diaphragms made from
Hastelloy, Tantalum, or Fluoroplastic provides exceptional
corrosion resistance.
High-Viscosity or Slurry Media: For substances like heavy oils, paints, resins, pulp, and mud, the
smooth diaphragm surface and flush-mounted design prevent clogging
and ensure the medium flows freely without solidifying in the
pressure port.
Crystallizing or Particulate Media: In applications involving syrups, molten salts, or granular
solids, the diaphragm seal prevents crystals or particles from
entering and blocking the gauge mechanism, a common failure point
for standard gauges
High-Temperature Processes: The availability of a high-temperature model (up to 600°C) makes
it suitable for applications in power generation, boiler systems,
and industrial heating processes where media temperature is
extreme.
Sanitary Applications: With specific material choices and a smooth, cleanable diaphragm
surface, it can be configured for use in the food and beverage or
biotechnology industries where hygiene is critical.
