Häger GmbH & Co. KG Custom Valve Modifications
We specialize in the production of custom and special valves, tailored individually to the customer's requirements and needs, with the advantage of the shortest delivery times and the highest quality standards.
We manufacture industrial valves according to your specifications.
We manufacture special and custom valves precisely according to customer specifications – fast, flexible, and with the highest quality. Thanks to modern technology and many years of experience, we provide tailored solutions that reliably meet even the most complex requirements.
Customized Manufacturing to Meet Your Specifications
We specialize in the production of special and custom valves, individually manufactured to meet each customer’s requirements and needs — with the advantage of exceptionally short delivery times and the highest quality standards.
✓ Custom Lengths
The face-to-face dimensions of industrial valves vary significantly. For the European market, these dimensions are defined by EN 558-1. In contrast, in the American market, face-to-face lengths are manufactured according to ASME B16.9. Typical face-to-face lengths for gate valves include the basic series 14 and 15. Depending on customer requirements, the length of the weld ends can be customized. This allows the valve to fit perfectly into the customer’s piping system.
✓ Mixed-End Connection Options
Small valves up to and including 2½ inches can be supplied with different pipe connection types. It is possible to have a flange on one side and a butt-weld or socket-weld end on the other side.
✓ Flanged Connection: ANSI, DIN, JIS or Custom
The flanged connection typically serves as a non-destructive, detachable joint. The purpose of the flange connection is to connect the industrial valve to the pipeline. Since pipelines are installed according to different standards in many countries, we are able to manufacture customized flange connections for our industrial valves.
✓ Butt-Weld Ends, Socket-Weld Ends, and Threaded Connections according to BSP and NPT Standards
Butt-weld ends, socket-weld ends, and threaded connections are available in numerous variants, allowing for optimal customization according to customer specifications. This is especially advantageous when customers have limited space in the pipeline to install the valve. By adjusting the valve’s face-to-face dimension, gate valves, globe valves, or ball valves can be perfectly adapted to the piping system.
✓ Throttle and Control Cones
For flow and pressure control, globe valves with control cones are preferred. With a simple modification to the valve cone, this valve can also be used as a control valve.
✓ End Position Feedback
End position feedback can be provided either by installing electric limit switches or proximity sensors on the valve yoke, or, in the case of electric actuators, by integrating limit switches into the gearbox. The feedback is contactless via proximity sensors. A major advantage of end position feedback devices is that they clearly indicate to workers on site whether the valve is in the open or closed position.
✓ Thermal Jacket for Heating or Cooling
Media with high viscosity or low pour point must be kept at temperature during the process to maintain flow. One solution is an electric heating coil wrapped around the industrial valve and pipeline. Another option is heating via steam or hot water in a heating jacket. The system is hermetically sealed on the outside by a bellows seal at the stem. This solution also allows use in highly toxic environments.
✓ Stem Extensions / Insulation Adapters
Spindle extensions are primarily used on gate valves, globe valves, or ball valves. This allows these valves to be installed underground and operated above ground. The spindle or spindle extension is articulately connected to the shut-off element. The insulating extension is used in low-temperature applications down to -200°C. In this temperature range, valves are typically housed within insulation. The insulating extension keeps the valve handwheel outside the insulation and the gland flange accessible. This design significantly reduces the risk of the valve stem freezing.
✓ Modification According to TA-Luft Standards
To reduce emissions when handling liquid or organic substances, so-called TA-Luft gland packings or seals are used. In industrial plants, a wide variety of valves are installed to carry out processes. Valves such as gate valves feature a stem that leads from the product chamber to the outside environment. This stem is equipped with a sealing system. Increasing sensitivity regarding emissions requires a special stem seal that enables minimal leakage. The use of TA-Luft packings significantly reduces emissions.
✓ Bypass
Bypasses are designed to relieve pressure. This means the valve does not have to be opened or closed against the maximum differential pressure. However, the differential pressure can only be reduced if certain conditions in the overall system are met. If a constant static pressure is present—such as with a valve installed directly at a tank—these reliefs have only a marginal effect. Therefore, it cannot always be assumed that bypasses reduce differential pressure. Bypasses also serve to drain check valves or assist in opening and closing gate valves or globe valves.
