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        Type 77

        Type 77

        產品詳細

        Type 77 Vacuum Regulator
        • Single-unit control of pressures from 29" Hg vacuum to 150 psi
        • Flow capacity up to 40 SCFM
        • Dampening action of aspirator tube maintains stable output pressure
        • Output virtually unaffected by changes in supply pressure
        • Can be disassembled and serviced without removing from line
        Product Detail:

        Bellofram’s Type 77 Vacuum Regulator incorporates a fixed negative 15 psig bias spring to maintain vacuum outputs up to 29" Hg. An adjustable opposing range spring increases controlled pressure outputs up to 150 psig. Output pressure droop under varying downstream flow conditions is minimized by use of an aspirator tube which adjusts the air supply valve opening in accordance with flow velocity. A balanced supply valve, utilizing a reinforced rolling diaphragm, keeps regulator output virtually immune to changes in supply pressure. Stack-up construction makes the Type 77 easily serviceable, without removing it from the air line.

        The Type 77 provides precise control in subatmospheric pressure applications. Specific uses include sample collecting systems, air quality monitoring, parts coating operations, and other industrial functions requiring controlled system pressure from 29" Hg vacuum to 150 psig. The regulator may be installed either upstream or downstream from the vacuum pump. Upstream installation is preferred when rapid evacuation of a vessel or system is required, because the exhaust capacity of the pump is normally greater than that of the regulator. In all other applications, the regulator can be located between the pump and the vessel.

        Part Numbers:
        Type 77
        Range
        Part Number
        BAR
        psig
        1/4 NPT Port
        3/8" NPT Port
        Vac. to
        0.1
        2
        960-500-000
        960-505-000
        Vac. to
        0.7
        10
        960-501-000
        960-506-000
        Vac. to
        2.1
        30
        960-502-000
        960-507-000
        Vac. to
        6.9
        100
        960-503-000
        960-508-000
        Vac. to
        10.3
        150
        960-504-000
        960-509-000
        To order BSPT threads (including Gauge Port) add "BSPT" to end of part number.
        Options:
        Replace the last three digits of the part number with digits from the table below. If more than 2 combination needed, Consult Factory.
        OPTION
        5
        7
        8
        5
        Epoxy Coating
        005
        075
        085
        7
        Mounting Bracket
         
        007
        087
        8
        Pressure Gauge
        008
        Corrosive Resistant Epoxy Finish: An epoxy paint applied to the body and bonnet of the regulator exterior surfaces to provide increased corrosion resistance.
        Mounting Bracket: Steel (dichromate finish) bracket for side mounting.
        Pressure Gauge: Dual scale 2.5 in. (63 mm) gauges. Ranges include 30" Hg – 15 psig (-100 to 100 kPa), 30" Hg – 60 psig (-100 to 400 kPa), and 30" Hg – 150 psig (-100 to 1100 kPa). When specified with regulator, the correct range will be supplied. For NPT versions only.

         


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