ASK Co., Ltd. Hydraulic, Coolant Accessories&Measuring Instruments.

◁Measuring equipment

▼Glycerin-filled pressure gauge ø60,ø75,ø100

Glycerin filled pressure gauge ø60/75/100 OPG

RoHS
Glycerin pressure gauge A-type

A-type:Frameless

Glycerin pressure gauge B-type

B-type:Round frame

Glycerin pressure gauge D-type

D-type:Back mount

The glycerin-filled pressure gauge OPG series is a pressure gauge with excellent vibration resistance and durability!

    • The OPGΦ60 series, which is the most standard size, comes standard with a safety mark! The coloring of the color coding option can also be installed.

      (OPGΦ75 series and OPGΦ100 series are not compatible with safety marks and coloring)

    • The exterior and wetted parts of OPGΦ100 (A, B, D type) are all stainless steel specifications.

    • Movement of the pointer due to mechanical vibration is absorbed by the viscous drag of the glycerin liquid in the hermetically-sealed pressure gauge.

      Movement of the Bourdon tube is also absorbed, thereby absorbing the pulsating pressure of the fluid.

    • Glycerin liquid serves as lubricating oil for the friction part of the bearing and gear in the pressure gauge, thereby ensuring durability of the internal mechanism.

    • A dedicated throttle for absorbing pulsating pressure and surge pressure is built into the pressure gauge socket.

    • Safety measures are provided to ensure that the front glass is not thrown away and hydraulic oil is purged out of the safety valve, if the Bourdon tube be broken.

    • Since the green safety mark is attached to the circumference of the case, pressure range setting can be set easily (only for 60 mm-diameter type).

    • Select a pressure gauge whose top pressure reading is more than double the applicable pressure range.

    • We issue various certificates related to pressure gauges for a fee.

  • Type

    Profile description

    OPG A-type

    A type:Frameless
    The connection thread protrudes from the bottom of the pressure gauge, and this is the most common shape in which the connection thread holds the pressure gauge.

    OPG B-type

    B type:Round frame
    A shape based on the A shape with a panel fixing flange added to the back.
    As with the A type, the connection screw protrudes from the bottom of the pressure gauge, so it is piped on the front side of the panel.

    OPG D-type

    D type:Back mount
    It is embedded in the panel and fixed with the attached fixing metal fittings.

    ▷For details on how to attach to the panel, see here.

    Specifications

    OPG 仕様

    Pressure Range Table

    OPG 圧力レンジ表
    • ▷Due to the revision of JIS standards (JIS B7505-April 1, 1994), the unit of kgf/cm² is currently not supported.(Japanese page)

    How to use the safety mark (Only ø60mm)

    OPG セーフティーマーク取付方法

    Instruction for use

    • Some models cannot be manufactured depending on the combination of shape, size, and pressure range, so please refer to the model list for each model when selecting.

    • Mount the glycerin pressure gauge vertically. Depending on the mounting orientation other than vertical, the indication accuracy may be disturbed or the glycerin filled liquid may leak.

    • Glycerin-filled pressure gauges with a hand-written special dial cannot be manufactured.

    • Please refer to "Precautions when using 【Color-ring CR】" for handling  color-ring CR.

    • If the maximum scale is 1 MPa or less, raise the green plug on the safety cap before use.

    【Safety cap for low pressure】
     Attached to the range of 1 MPa or less.

    OPG Safety cap for low pressure
    OPG Safety cap for low pressure

    Plug closed.

    Raise the plug.

    OPG low pressure safety cap illustration

    For pressure gauges of 1 MPa or less, the torque of the Bourdon tube is weak, so temperature changes (internal pressure changes) inside the pressure gauge case affect the indication accuracy.
    By pulling up on the green plug, the internal and atmospheric pressures are balanced and accuracy is maintained.
    After releasing the internal pressure, always use the product with the safety cap facing upwards.

    【Safety cap for high pressure】
     Attached to the range of 1.6 MPa or more.

    OPG high pressure safety cap

    Models with a range of 1.6 MPa or higher do not need to release the internal pressure.

    Various certification documents related to pressure gauges

    Document download

    Drawing PDF download

    *Data is located on Google Drive. If you are unable to access Google Drive due to internal security reasons,
      we will send it as an email attachment, so please use the inquiry form (Contact Us) to request it.
    ▷If you would like CAD data or instruction manuals, please use the inquiry form.
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    Copyright(C) ASK co.,ltd. All Right Reserved.