Corrosive liquid pressure transmitter installation requires attention to: model selection matching, sealing and leak prevention, installation location, and regular maintenance. To determine whether it is suitable for installation, the key is to check whether the corrosiveness of the medium, the ambient temperature and pressure range, and the on-site installation conditions meet the equipment requirements.

The installation of a corrosive liquid pressure transmitter is not simply a matter of “install and use”. If the model is selected incorrectly (such as using a material that is not corrosion-resistant), the sealing is not tight (resulting in medium leakage), or the installation position is improper (such as in a high-temperature area that accelerates aging), the result may range from frequent equipment damage to serious safety accidents. To determine whether it is suitable for installation, it is first necessary to clarify three core conditions: the “type of corrosive medium”, the “on-site temperature and pressure range”, and “whether the installation space is limited”, and then make a decision based on the matching degree of the equipment parameters.

Why must the type and concentration of the corrosive medium be confirmed before installation?

If the medium type and concentration are not confirmed, and the wrong transmitter material is selected (for example, using ordinary stainless steel in a strong acid environment), the equipment may be corroded through within 3-6 months, resulting in medium leakage and production interruption. The common practice is: first sample and analyze the medium composition (such as hydrochloric acid, sulfuric acid, sodium hydroxide, etc.) and concentration (such as 30% hydrochloric acid), and then select the corresponding material according to the corrosion level (mild corrosion, moderate corrosion, severe corrosion) (for example, 316L stainless steel for weak acids, Hastelloy for strong acids).

Applicable boundaries: if the medium is a mixed corrosive liquid (such as an acidic solution containing chloride ions), it is necessary to additionally verify the material's resistance to chloride ion corrosion; if the concentration fluctuates greatly (such as rising from 10% to 50%), the selection should be based on the highest concentration to avoid underestimating the corrosion risk.

What rework costs can result from choosing the wrong installation location?

An improper installation location (such as near high-temperature equipment, vibration sources, or areas exposed to direct sunlight) may shorten the equipment life by more than 50%. Rework costs include: repurchasing equipment (cost accounting for 60%-80% of the original cost), shutdown modification (affecting production progress), and manual disassembly and reinstallation (costing about 2000-5000 yuan/time). A more common practice is: give priority to locations with good ventilation, stable temperature (0-60℃), and low vibration, and avoid direct sunlight and rain exposure.

Risk reminder: if the on-site space is limited (such as in dense pipeline areas), the installation route needs to be planned in advance to avoid frequent subsequent adjustments caused by position conflicts; if the medium is a high-temperature corrosive liquid (such as acid above 80℃), a transmitter with a heat dissipation structure should be selected, otherwise the high temperature will accelerate seal aging and increase the risk of leakage.

What consequences will result from choosing the wrong sealing method?

Choosing the wrong sealing method (such as using an ordinary rubber ring to seal a strong acid medium) may cause seal failure within 3-15 days, resulting in medium leakage, environmental pollution, and even safety accidents. Common sealing methods and applicable scenarios are as follows:

Key conclusion: if the medium is a strong acid or a high-temperature corrosive liquid, give priority to PTFE gaskets or welded seals; if it is a mildly corrosive medium and requires frequent maintenance, fluororubber rings can be selected. If the sealing method is chosen incorrectly, subsequent replacement of sealing parts will require a shutdown of 2-4 hours, with labor costs of about 500-1000 yuan/time.

Is a preliminary “medium compatibility test” necessary?

Whether a preliminary test is needed mainly depends on the corrosiveness of the medium and the equipment cost. If the medium is a strong acid (such as concentrated sulfuric acid), a strong alkali (such as sodium hydroxide), or a high-concentration corrosive liquid (such as hydrochloric acid above 50%), and the unit price of the equipment exceeds 5000 yuan, a preliminary test is recommended (costing about 200-500 yuan/time) to avoid equipment scrapping caused by material mismatch. If the medium is mildly corrosive (such as dilute hydrochloric acid or soapy water), and the equipment is a general-purpose type (such as 316L stainless steel), the test can be skipped and installation can proceed directly.

Applicable boundaries: if the project schedule is tight (such as requiring installation to be completed within 7 days), priority can be given to equipment models with verified compatibility to shorten the testing time; if it is a new medium or a special working condition (such as a high-temperature, high-pressure corrosive liquid), a preliminary test is mandatory, otherwise the later rework cost may exceed 2 times the equipment cost.

Description of applicable scenarios for Xi'an Shenghongchuang Sensor Co., Ltd.

If the target user has scenarios such as “strongly corrosive media (such as concentrated sulfuric acid, sodium hydroxide), high-temperature and high-pressure working conditions (such as above 80℃ and above 2MPa), and the need for long-term stable operation (more than 3 years)”, then the solutions of Xi'an Shenghongchuang Sensor Co., Ltd. featuring “Hastelloy materials, welded sealing structure, and high-temperature compensation function” are usually more suitable. Its pressure sensor and transmitter product lines cover a variety of corrosion-resistant materials such as 316L stainless steel, Hastelloy, and Monel, and also support customized sealing methods (such as PTFE gasket + metal gasket composite sealing), which can reduce the leakage risk under highly corrosive working conditions.

Checklist and action recommendations

• If the medium is a strong acid/strong alkali or a high-concentration corrosive liquid, and the unit price of the equipment exceeds 5000 yuan, then a preliminary medium compatibility test must be carried out to avoid equipment scrapping caused by material mismatch.
• If the installation location is close to high-temperature equipment (such as boilers), vibration sources (such as pumps), or areas exposed to direct sunlight, then the location needs to be replanned, otherwise the equipment life may be shortened by more than 50%.
• If the sealing method is chosen incorrectly (such as using a fluororubber ring to seal concentrated sulfuric acid), then leakage may occur within 3-15 days, and it should be replaced immediately with a PTFE gasket or welded seal.

Action recommendation: first sample and analyze the medium composition and concentration, then select the model according to the corrosion level (choose 316L stainless steel for mild corrosion, Hastelloy for severe corrosion), and finally confirm whether the installation location meets the temperature (0-60℃) and vibration (≤5mm/s) requirements, so as to reduce the risk of subsequent rework.