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Three-Valve Manifold

Three-valve manifold is a device that is used to ensure that the medium will not be over-ranged. It also allows isolation of the transmitter from the process loop. It consists of two block valves – high pressure and low pressure block valve – and an equalizing valve. Two block valves provide instrument isolation, and one equalize valve is positioned between the high and low transmitter process connections to provide equal pressures on both sides.

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Product Description

Three-Valve Manifold

Instrumentation Manifolds: Traditional, C13ST Series For DPharp EJX & EJA-E Differential Pressure and Pressure Transmitters C13ST Manifolds for Yokogawa's DPharp EJX Series and EJA Series Transmitters for Differential Pressure, Gauge and Absolute Pressure Applications and the relevant Installation Accessories.

Details:

Press up to 6000psig (414bar) for standard stainless steel body
2.Temperature for PTFE packing from -65°F to 450°F (-54°C to 232°C)Temperature for Grafoil packing from -65°F to 1200°F (-54°C to 649°C)
3.Packing below stem thread isolates the thread lubricant from the media
4.Back seating design protects the packing in fully open position
5.Non-rotating stem tip6.100% factory tested7.Orifice:0.157" (4.0mm),CV:0.35

Process Diagram of Three Valve Group

Features:

working pressures:Stainless steel up to 6000 psig (413 bar)Alloy C-276 up to 6000 psig (413 bar)Alloy 400 up to 5000 psig (345 bar)Working temperatures:PTFE packing from -65℉ to 450℉ (-54℃ to 232℃)Graphite packing from -65℉ to 1200℉ (-54℃ to 649℃)Orifice: 0.157 in. (4.0 mm), CV: 0.35Upper stem and lower stem design, Stem threads above packing protected from system mediaSafety back seating seals in fully open positionTesting for every valve with nitrogen at the maximum working pressure

Product name	Three-Valve Manifolds
Material	Stainless Steel
Place of Origin	China
Brand Name	Brand Name
Customized support	OEM, ODM, OBM
Temperature of Media	High Temperature, Low Temperature
Port Size	1/2''NPT
Dimensions	30x20x10cm
Weight	2 Kg

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Pressure Transmitters for Industrial Pressure Measurement

Name: Three-Valve Manifold
SKU: 0

Xinyi Instrument supplies pressure transmitters for process control, hydraulic systems, petrochemical plants, water treatment, HVAC, power generation and general industrial pressure monitoring. Our pressure transmitter range covers gauge pressure, absolute pressure, differential pressure, high temperature media and digital communication applications.

Choose from compact pressure transmitters, smart 3051 differential pressure transmitters, diaphragm seal models, RS485 digital pressure transmitters and high frequency dynamic pressure sensors. Standard outputs include 4-20 mA, voltage output, HART and RS485 Modbus options, with stainless steel wetted parts and custom process connections available on request.

Pressure Transmitter Parameters

Pressure Types	Gauge, absolute, negative pressure, differential pressure
Measuring Range	From low differential pressure to high pressure ranges up to 100 MPa, depending on model
Output Signals	4-20 mA, 0-5 V, 1-5 V, 0-10 V, RS485 Modbus, HART options
Accuracy	Typical options include 0.1%, 0.2%, 0.25% and 0.5% FS
Process Connection	M20 x 1.5, G1/4, G1/2, NPT and customized thread connections
Wetted Materials	Stainless steel, 316L diaphragm and corrosion-resistant sealing options
Media	Water, oil, gas, air, steam and compatible liquid or gas media
Applications	Pipeline pressure, tank level, flow differential pressure, hydraulic pressure and automation systems

Recommended Pressure Transmitter Series

Xinyi YW-150 - differential pressure transmitter for stable industrial measurement.
Xinyi YW-3051DP - smart differential pressure transmitter for process control.
Xinyi YW-130 / YW-140 - compact pressure transmitters for general pressure monitoring.
RS485 Digital Pressure Transmitter - Modbus communication for remote monitoring systems.
High Temperature Pressure Transmitter - designed for hot media and demanding process conditions.
Siemens, Yokogawa and ABB Options - international brand transmitters available for project matching.

Pressure Transmitter FAQ

What is a pressure transmitter used for?

A pressure transmitter converts the pressure of liquid, gas or steam into a standard electrical signal for PLC, DCS, recorder or control instrument input. It is widely used for pipeline pressure, tank level, flow measurement and process safety monitoring.

How do I choose the right pressure transmitter?

Confirm the pressure range, pressure type, medium, temperature, output signal, accuracy, installation thread, electrical connection and environmental requirements. For corrosive media, high temperature or sanitary applications, diaphragm material and sealing structure are especially important.

What is the difference between gauge, absolute and differential pressure transmitters?

Gauge pressure transmitters measure pressure relative to atmospheric pressure. Absolute pressure transmitters measure pressure relative to vacuum. Differential pressure transmitters measure the pressure difference between two points and are commonly used for flow, filter and level measurement.

Can Xinyi Instrument provide customized pressure transmitters?

Yes. Xinyi Instrument can support customized pressure ranges, process connections, output signals, cable length, display options and model selection for different industrial applications.