Diaphragm Seal for Pulp and Paper Industry

Pressure Instruments

SJ Gauge specializes in a wide range of professional pressure measurement instruments, including digital pressure gauges, differential pressure gauges, stainless steel mechanical gauges, and pressure transmitters. Our products are manufactured under strict quality control standards and are designed to meet diverse industrial and scientific applications. With a comprehensive product portfolio and reliable after-sales service, we ensure long-term performance and peace of mind for our customers.

We offer flexible customization services tailored to your specific requirements. From pressure gauges to transmitters, each product can be engineered to match your exact application needs. Whether for large-scale industrial procurement or low-volume customized orders without minimum quantity limitations, SJ Gauge provides fast response and efficient solutions. We understand the complexity of different operating environments and are committed to transforming your requirements into precise and reliable measurement solutions. For any customization inquiries, please feel free to contact us.

  • Diaphragm Seal for Pulp and Paper Industry
    Model: DIPI

    Diaphragm Seal for Pulp and Paper Industry

    • External chemical seal with welded diaphragm, designed to suit connections in the pulp and paper industries
    • Suitable for attaching to pressure gauges, pressure switches, and pressure instruments
    • Designed to be used for highly viscous process media such as pulp and plastic, and chemicals
  • Diaphragm Seal for Homogenizer Machine
    Model: DIHO

    Diaphragm Seal for Homogenizer Machine

    • Available with process connections in various designs, fitting with all common measuring points
    • Designed to prevent aggressive or contaminating medium from entering a conventional pressure gauge
    • Widely used on homogenizers such as those found in sanitary applications, production of cosmetics and creams, dairies, and the pharmaceutical industry
  • Diaphragm Seal for Melting High Temperature
    Model: DIHI

    Diaphragm Seal for Melting High Temperature

    • Used to measure molten state process media
    • A capillary can be selected, suitable for remote observation
    • Widely used in the synthetic chemical, synthetic fiber, and plastic industries
  • Differential Pressure Gauge, All-metal Media Chamber
    Model: PRDC

    Differential Pressure Gauge, All-metal Media Chamber

    • Feature a highly corrosion-resistant all-metal construction and measuring cell protected against tampering
    • Used for pump monitoring and control, filter monitoring and level measurement
    • For gaseous and liquid aggressive media that are not highly viscous or crystallizing, also in aggressive environments
  • Differential Pressure Gauge, Double Diaphragm
    Model: PRHD

    Differential Pressure Gauge, Double Diaphragm

    • High working pressure (static pressure) and high overload safety, selectable ranges up to 30 MPa
    • The use of high-quality stainless steel materials and the robust design are geared to applications in the chemical and process engineering industries
    • Suitable for liquid and gaseous media in aggressive environments
    • Equivalent specifications that closely match the WIKA 732.14
  • Differential Pressure Gauge, Cryogenic Tanks
    Model: PRLD

    Differential Pressure Gauge, Cryogenic Tanks

    • Supports cryotechnology; applicable for measuring low-temperature mediums
    • Oil-free is available for measuring special gases such as flammable and explosive gases
    • Commonly used to measure closed tank truck liquid levels for oil, liquid nitrogen, and other materials; also useful for filter monitoring

    ◼️ Fig.1: Differential pressure gauge model PRLD
    ◼️ Fig.2: With Option valve manifold with working pressure indication

  • Electric Contact Gauge, magnetic snap-action
    Model: PRE4.H

    Electric Contact Gauge, magnetic snap-action

    • Stainless steel bezel with glass window, beautiful but still durable
    • A variety of contact types to choose from
    • Used in chemical, petroleum, metallurgy, machinery and other industries
    • Same specifications as WIKA-PGS23
    • Switch Contact Pressure Gauge, Euro Warning/Alarm Contact
  • Electric Contact Gauge, inductive contact
    Model: PRE-IDT

    Electric Contact Gauge, inductive contact

    • Spark-free operation and low-energy signals, ensuring safety in explosive environments.
    • A Various contact types available
    • Used in chemical, petroleum, metallurgy, machinery and other industries
    • Same specifications as WIKA 831
    • Switch Contact Pressure Gauge, Euro Warning/Alarm Contact
  • Electric Contact Gauge, explosion-proof
    Model: PRE-XS

    Electric Contact Gauge, explosion-proof

    • Suitable for observation and automatic control
    • Adjustable magnetic strength to avoid frequent, accidental collision of contacts due to vibration
    • A variety of contact types to choose from
  • Electric Contact Gauge, 3 inches
    Model: PRE3

    Electric Contact Gauge, 3 inches

    • Suitable for observation and automatic control
    • Adjustable magnetic strength to avoid frequent, accidental collision of contacts due to vibration
    • A variety of contact types to choose from
  • Differential Pressure Switch
    Model: PRSMD

    Differential Pressure Switch

    • Easy installation and no power supply needed
    • Easily set the differential pressure switch values on the site
    • Limited to non-flammable and non-corrosive gases
    • Usually used in filter, fan, and duct pressure monitoring in building automation systems in the HVAC
  • Differential Pressure Gauge, Low Differential Pressure
    Model: PRMD

    Differential Pressure Gauge, Low Differential Pressure

    • Measures the small pressure difference between two pressure sources
    • Only suitable for measuring gases, can not measure liquid
    • Used in hospitals, laboratories, factories, gas stations and storage tanks
    • Same specifications as Series 2000 magnehelic®
  • Differential Pressure Gauge, Mini
    Model: PRMDS

    Differential Pressure Gauge, Mini

    • Small size with simple construction
    • Removable lens and rear-housing
    • Used in air conditioners, medical respiratory equipment and filters
  • Differential Pressure Gauge, Duplex
    Model: PRDD

    Differential Pressure Gauge, Duplex

    • The pressure gauges are equipped with two independently working bourdon tube measuring systems
    • LED lighting for operating voltages of DC24V or AC110V
    • Typically used in filters and rail braking systems
  • Mechanical Pressure Switch, Compact
    Model: MPS

    Mechanical Pressure Switch, Compact

    • Automatically resetting switch design
    • Wide pressure range, apply to multi work situation
    • Application to air、water pressure control, Indoor air conditioner system or more…
  • Valve Manifold for Pressure Instrument
    Model: MSFZ20~50

    Valve Manifold for Pressure Instrument

    • Divided into 2-valve manifolds, 3-valve manifolds, and 5-valve manifolds based on the applications
    • Shut-off, pressure compensating, purge and vent valves for differential pressure measuring instruments
    • Widely used in industries of petroleum, chemical, metallurgical, power, liquid, natural gas, and various conveying pipelines

    ◼️ Figure 1, 2: MSFZ20, 2-valve manifold
    ◼️ Figure 3, 4: MSFZ30, 3-valve manifold
    ◼️ Figure 5, 6: MSFZ50, 5-valve manifold