Pipeline ancillaries Pressure gauges and temperature gauges
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2026
TI-P179-17 CMGT Issue 1
VLS 1935 needle valves
Description VLS 1935 needle valves separate the process medium from the measuring instrument such as a pressure gauge, pressure switch or pressure transmitter. By closing this valve, the instrument can be safely disassembled for operations such as recalibration or replacement. Thanks to the pin that does not rotate during its vertical movement, wear on the sealing elements is reduced. This feature is particularly important in the case of frequent valve manoeuvres, significantly increasing valve life. In addition, the burst-tight design of the valves increases safety especially in applications with high operating pressures. These valves are used for separating measuring instruments from the process by means of closing, venting and pressure compensation. They are designed for use in applications with clean liquid and gaseous fluids that are not highly viscous or crystallising. The product must only be used with fluids that are not to be regarded as harmful to the parts in contact with the fluid throughout the operating range of the instrument. Any change in the state of matter or decomposition of unstable fluids is prohibited. The product may only be used for applications within its technical performance limits (e.g. max. ambient temperature, material compatibility,...). In case of misuse or operation of the product outside the technical specifications, the instrument must be taken out of service immediately and inspected by an authorised service technician. These valves do not have their own potential source of ignition. The operator is responsible for safe use in hazardous areas in accordance with recognised technological standards. For the reasons mentioned above, these valves are not marked and do not have their own certification. The product was designed and manufactured exclusively for its intended use and may only be used for this purpose. The manufacturer is not liable for claims of any kind when the instrument is used outside its intended purpose.
Main features Valve seat tested for tightness to BS6755 / ISO 5208 leak rate A
Available versions 2 way ½" BSPP male / ½" BSPP female 2 way ½" BSPP male / ½" BSPP female with vent screw 3 way ½" BSPP male / ½" BSPP female / Test flange Ø 40 mm with vent screw Options on request: 2 way ¾" BSPP male / ¾" BSPP female 2 way ¾" BSPP male / ¾" BSPP female with vent screw 3 way ¾"BSPP male / ¾" BSPP female / Test flange Ø 40 mm with vent screw 2 way ½" NPT male / ½" NPT female 2 way ½" NPT male / ½" NPT female with vent screw 3 way ½" NPT male / ½" NPT female / Test flange Ø 40 mm with vent screw
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TI-P179-17 CMGT Issue 1
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VLS 1935 needle valves
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