AS-Schneider Block & Bleed Manifolds are designed for mounting to Pressure Gauges, Pressure Transmitters and Pressure Switches. The standard vent connection is 1/4 NPT female. Pipe plugs are not installed as standard.
 Datasheet |
AS-Schneider Block & Bleed Gauge Valves are designed for mounting to Pressure Gauges, Pressure Transmitters and Pressure Switches and are manufactured and tested according to DIN 16272. The type with 1/2 NPT connection (see below) as well as Gauge Valves with test flange are not mentioned in DIN 16272. According to DIN 16272 are the valves applicable for a max. allowable (Working) Pressure (PS) of 250 bar (3,626 psi) (brass) respectively 400 bar (5,801 psi) (carbon steel and stainless steel) and a max. allowable Temperature (TS) of 120°C (248°F) for liquids, gas or vapors. The max. allowable Temperature (TS) of 120°C (248°F) is considering the requirement that valves and measuring instruments need to be protected against heating by hot media. This can be achieved by syphons or by instrument impulse lines with sufficient length. However the AS-Schneider valves can be used for temperatures up to 300°C (572°F) - PTFE up to 232°C (450°F), Graphite up to 300°C (572°F).
| Datasheet |
AS-Schneider Block & Bleed Gauge Valves are designed for mounting to Pressure Gauges, Pressure Transmitters and Pressure Switches and are manufactured and tested according to DIN 16272. Gauge Valves with test flange (see below) are not mentioned in DIN 16272. According to DIN 16272 are the valves applicable for a max. allowable (Working) Pressure (PS) of 250 bar (3,626 psi) (brass) respectively 400 bar (5,801 psi) (carbon steel and stainless steel) and a max. allowable Temperature (TS) of 120°C (248°F) for liquids, gas or vapors. The max. allowable Temperature (TS) of 120°C (248°F) is considering the requirement that valves and measuring instruments need to be protected against heating by hot media. This can be achieved by syphons or by instrument impulse lines with sufficient length. However the AS-Schneider valves can be used for temperatures up to 300°C (572°F) - PTFE up to 232°C (450°F), Graphite up to 300°C (572°F).
| Datasheet |
Pressure Gauge Valves with Separate Test Port by Armaturenfabrik Franz Schneider GmbH + Co. KG
Pressure gauge valves with a separate test port from Armaturenfabrik Franz Schneider GmbH + Co. KG are specialized isolation valves for pressure instruments such as gauges, pressure transmitters and switches. They feature an additional test connection that can be operated independently of the main shut-off valve.
These valves simplify testing and calibration by providing direct access to the measuring line without opening the main isolation or removing the instrument. This reduces process interruption and enhances safety during maintenance, verification and calibration tasks.
Frequently Asked Questions about Pressure Gauge Valves with Separate Test Port
What does “separate test port” mean?
A separate test port is an additional connection on the valve that can be opened or closed independently from the main isolation, allowing test or calibration equipment to be connected directly to the measurement line.
Where are these valves used?
They are used in instrumentation systems where frequent testing, verification or calibration of instruments is required without interrupting the process.
What are the benefits of a separate test port?
It allows test equipment to be connected without opening the primary isolation, reducing downtime and enhancing safety.
How do these valves differ from standard gauge valves?
In addition to the main isolation, they provide a separate, independently controlled test connection for direct access during instrumentation tasks.
Which instruments can be combined with these valves?
They can be combined with gauges, transmitters, switches and other pressure instruments that benefit from direct test access.
How is calibration done via the test port?
Test equipment is connected to the separate test port while the main valve remains closed, allowing direct measurement verification without process interruption.
Are these valves suitable for high pressures?
Yes, they are designed for typical industrial pressure ranges and provide reliable isolation and test access.
What materials are used?
Materials such as stainless steel, steel and brass are used to ensure strength, corrosion resistance and durability.
Which media can be measured?
Depending on seals and material selection, they are suitable for gas and liquid media.
How does the separate test port help maintenance?
It enables testing and calibration without disconnecting or removing the main valve or instrument, saving time and reducing process disturbances.
Are there versions with vent ports?
Certain configurations may include additional vent ports to safely release residual pressure when needed.
How does the test port affect installation?
Installation is similar to other gauge valves, with the added benefit of an accessible test connection for direct on-site testing.
How does the separate test port support routine testing?
It makes recurring test and calibration intervals easier and quicker to perform without affecting the main process flow.
How safe is the separate test connection?
Because it can be isolated independently, it contributes to safer test operations by keeping the main process isolated while accessing the measurement line.
Can these valves be retrofitted?
Yes, they can be retrofitted when connection standards and space allow the additional test port.
How do I choose the right valve?
Consider instrument type, pressure rating, medium, connection size and the requirement for a separate test port.
Are these valves suitable for specialized applications?
Certain variants can be configured for specific situations such as oxygen service or fugitive emissions depending on requirements.
Does the test port impact leak tightness?
Both the main and test connections are designed to remain tight when closed, minimizing potential leakage points.
How do these valves enhance operational safety?
They provide secure isolation and direct test access, improving overall safety and reliability in instrumentation systems.