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Hauerwas valve grinding machine logo
Hauerwas Valve Repair Machines

Deep Discounts Available on stock models

HH Roberts Machinery sold the first Hauerwas valve grinding and lapping machines to Ontario Hydro about 1970.
Hauerwas is the world leader in portable machines to repair valve seats on pipes in-situ.
display of Hauerwas valve repair machines
The machines are available in 2 basic categories

  • mobile or portable units to be mounted on valves in position in the pipe system allowing repair without the need to remove the valve

  • stationairy models for repair and/or production of valves.
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    under construction
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    Hauerwas Doppelex Mobil

    A portable grinding and lapping machine  
    for the reconditioning of surfaces on slide valves and flanges,
    in stable and mature design for continuous duty service
    with synchronously running double eccentric
    and telescopic machine arm.

    The DM series are portable machines, operational in any position, with synchronized running double eccentric.

    All Doppelex Mobil machines are equipped with a telescopic machine arm so that mounting of the machines on casings housings in confined position presents no obstacle.

    The lower part of the telescopic machine arm can be revolved by 180° enabling both sides of the slide valve sealing to be machined without changing the mounting of the machine.

    Between the portable and stationary Hauerwas machines the grinding and lapping accessories are interchangeable according to the possible working range.
     
    Working Range:
    Sealing surfaces on slide valves and flanges:
    DM 1
    DN     8 -   150 mm
    DM 2
    with extension up to
    DN   80 -   400 mm
    600 mm
    DM 3
    with extension up to
    DN 250 -   800 mm
    1000 mm
    DM 4
    with extension up to
    DN 500 - 1250 mm
    2000 mm
    DM 1-2
    DM   40 -   400 mm

    Accessories:
     - Compressed air drive motor can be supplied for all DM machines for use in dangerous environments.
    - Wheeled transportation box for the machine and the accessories
    - Pipe clamp with chain tensioning
    - Extensions for greater submerging depths

    Hauerwas DM3 valve lapping macihine Hauerwas DM-1-2 valve lapping machine
    Hauerwas Doppelex Mobil DM 3 
    mounted with pipe clamp with chain tensioning    		 Hauerwas Doppelex Mobil DM 1-2
    mounted with pipe clamp with chain tensioning

    several models of the Hauerwas valve lappers
    Hauwerwas DM1-2 mounted on a slide valve
    Machines DM 1, 2 and 3 
    together with 2 high speed grinding machines HVS    		 Vertically mounted DM 1-2
    machining a de-mounted slide-valve

    Many Huaerwas valve repair machines prepared for testing and shipping
    A Hauwerwas DM1 in it's trasport case
    Hauerwas Doppelex Mobil DM 2 under testing. DM 1 with electrical drive
    with additional compressed air drive and accessories in wheeled transportation box
    A Hauwerwas DM1 in its transport trolley Hauwerwas DM-3 in its transport case
    DM 2 with electrical drive in transport trolley DM 3 with electrical drive in transport trolley

    A Hauerwas DM-4 working on a 1000mm flange
    click for a larger image
       

    Download the factory catalogue on the DM Series
    To see a Quicktime video on the DM models, click here
    Doppelex Mobil machine at work (4.6 MB)
    You see a Doppelex Mobil machine DM 1-2 mounted on a slide valve by the pipe
    clamp with chain tensioning. First the Planet Disc is pressed against the sealing surface
    and then the machine is turned on showing the working principle of all DM machines. apple quicktime

    Download the Operator's Manual for the DM machine.

    Hauerwas DM-2 valve refurbishing machine with pneumatic drive
    click for a larger image
    		A DM-2 on a valve with pneumatic drive for hazardous environments
    The planetary disc can bee seen through the window cut in the valve .
    A Hauserwas DM-2 on a pipe with the extension drive
    click for a larger image
    		A DM-2 with a planetary disc,  mounted on a DN-300 (12") slide valve but turned outward to illustrate the mounting of the drive extension shaft to reach down to a deep immersion valve.
    the telescopic drive arm of the DM-2
    click for a larger image
    		This is the standard range telescopic drive arm for the DM-2

    The lower unit has a universal drive that allows the tools to self align on the valve seat
    the 600mm extension drive arm for the DM1
    		 This is the optional 600mm drive shaft extension for the DM-2.
    A 300mm extension is also available.

    This will allow and immersion depth of 1210 mm on the DM-2
    		Portable grinding and lapping machine for the renovation
    of surfaces on slide valves and flanges
    Doppelex Mobil DM 2 for valves DN 80 - 450 mm
    In extended working range for valves up to DN 600 mm

    Design, Performance: Portable machine,
    operational in any position, with synchronously running double eccentric adjustable from 0 to 15 or 0 to 20 mm, respectively, resulting in an oscillating circle of 0 to 30 or 0 to 40 mm, respectively. The upper eccentric drives the machine arm and ensures lateral alignment of the lapping and the grinding discs in the slide housings; the lower eccentric presses the discs against the workpiece and can be adjusted forwards and backwards.

    Drive: compressed air drive motor 6 bar

    Accessories: 1 machine arm with bevel gear, for grinding and lapping of sealing faces, particularly of stellite faces and grinding of surfaces of brass, bronze and stainless steel with a scale for setting the submerging depth in centimeters, telescopically adjustable downwards for the submerging depth. Pendulum joints for receiving the grinding and lapping discs.
    4 keys or spanners, 2 operating instructions with drawings

    Paint: color Red, RAL 2002. - extra charge for special colours
    Techn. Data: as set out in general brochure.
    The machine fulfills CE - VGB 4 -
    noise emission as per DIN 45635

    The stability and the design of the machine guarantees highest contact pressure of the working disc on the seating even by working depths of up to 1210 mm.

    Portable grinding and lapping machine for the renovation
    of surfaces on slide valves and flanges
    Hauerwas Doppelex Mobil Machines
    DM 1 for DN 40 - 150 mm
    DM 2 for DN 80 - 450 mm, in extension up to 600 mm
    DM 3 for DN 250 - 800 mm, in extension up to 1000 mm
    DM 4 for DN 500 - 1250 mm, in extension up to 2000 mm
    stable designed for the highest loading under continuous load service
    machine with synchronously running double eccentric and telescopic machine arm

    The " Hauerwas - Machines " are indispensable in:
    Boiler houses, pipe lines in general, mining, conventional steam-, water- and nuclear power stations, refuse incinerators, in refineries and outside installations, chemical industries, turbine ships, ship yards, valve producers, paper-, cellulose - and sugar plants, oil mills, breweries and maintenance companies.