PDS813 Pulp and Paper Pressure Transmitter

PDS813 Pulp and Paper Pressure Transmitter Overview

The PDS813 pulp and paper pressure transmitter is designed for pressure measurement in applications where ordinary threaded pressure transmitters may be easily blocked by the process medium.

In paper production and similar industrial processes, the measured medium may contain fibers, pulp, suspended solids, coatings, or high-viscosity liquids. If a traditional small pressure port is used, the pressure inlet can become blocked, causing slow response, unstable readings, or complete measurement failure.

The PDS813 solves this problem by using a flush diaphragm pressure transmitter structure. The sensing diaphragm is positioned at the front of the process connection and remains flush with the pipe or vessel inner wall. This reduces dead zones, prevents material accumulation, and improves long-term measurement reliability.

The transmitter supports 4–20 mA + HART, PROFIBUS PA, FOUNDATION Fieldbus FF, WirelessHART, and ZigBee communication options. It can be configured and monitored remotely through compatible communication equipment.

Flush Diaphragm Pressure Transmitter Design for Easy-to-Block Media

The key feature of the PDS813 is its flush diaphragm design.

Unlike conventional pressure transmitters, where the process medium enters a small pressure port, the PDS813 places the sensing diaphragm directly at the process interface. This design provides a smoother contact surface and reduces the risk of clogging.

This structure is especially useful for:

• pulp and paper slurry
• high-viscosity liquids
• fiber-containing media
• coating liquids
• adhesive or sticky fluids
• sediment-containing liquids
• crystallizing or easy-to-deposit media
• other easy-to-block process conditions

For applications where the medium is thick, sticky, or contains solids, a flush diaphragm pressure transmitter is usually more reliable than a standard threaded pressure transmitter.

Smart Pressure Transmitter Output and Communication Options

The PDS813 pressure transmitter supports several output and communication options for different control systems.

For most industrial applications, 4–20 mA with HART communication is still the most common option because it can be integrated with PLC and DCS systems while supporting intelligent configuration and diagnostics.

Key Features of the PDS813 Flush Diaphragm Pressure Transmitter

Special Process Connection for Paper Industry

The PDS813 uses a special process connection suitable for pulp, slurry, and other difficult media in paper-making applications. It is designed to reduce the clogging problems often found in standard pressure ports.

Forward-Mounted Sensing Element

The pressure sensing unit is mounted close to the process side, allowing the diaphragm to directly receive pressure from the medium without a long narrow pressure passage.

Flush Diaphragm Structure

The diaphragm is designed to be flush with the pipe inner wall or process connection surface. This helps reduce material accumulation, dead space, and blockage risk.

High Accuracy Pressure Measurement

The PDS813 provides accuracy of ±0.04% FS, with the highest accuracy option up to ±0.025% FS depending on configuration.

Fast 90 ms Response Time

With a response time of 90 ms, the transmitter can quickly respond to pressure changes, helping maintain stable process monitoring and control.

30:1 Rangeability

The maximum rangeability is 30:1, allowing flexible span setting for different pressure measurement applications.

Long-Term Stability

The transmitter provides long-term stability of ±0.1% FS over 10 years, helping reduce recalibration frequency and maintenance workload.

Intelligent Diagnostics and Simulation

The PDS813 supports intelligent diagnostics and simulation functions. These help users check transmitter status, verify output, and simplify commissioning or troubleshooting.

Multiple Anti-Corrosion Material Options

Different diaphragm and wetted material options can be selected for corrosive, viscous, or special media. Material selection should be confirmed according to the process medium, temperature, pressure, and chemical compatibility.

Technical Specifications for PDS813 Pressure Transmitter Selection

Industrial Applications of PDS813 Pulp and Paper Pressure Transmitter

Paper-Making Process Pressure Measurement

The PDS813 is suitable for pressure measurement in pulp pipelines, paper slurry systems, coating systems, and paper production processes where fibers or high-viscosity media may block ordinary pressure ports.

Pulp and Slurry Pressure Monitoring

Used for process pressure monitoring in pulp, slurry, fiber-containing liquids, and suspended solid media. The flush diaphragm design helps maintain a cleaner measuring interface.

High-Viscosity Media Applications

Suitable for viscous fluids where standard threaded pressure transmitters may respond slowly or become blocked due to material buildup.

Easy-to-Block Process Conditions

Applied in processes involving sticky, sediment-containing, crystallizing, or depositing media. The front-mounted diaphragm reduces the chance of blockage at the pressure measurement point.

Chemical and Coating Systems

Can be used in coating liquid, adhesive, polymer, resin, and compatible chemical processes where a flush diaphragm connection is preferred.

Water Treatment and Sludge Systems

Suitable for certain sludge, wastewater, and sediment-containing fluid applications where ordinary pressure inlets may be difficult to maintain.

Industrial Automation and Control Loops

The PDS813 can be connected to PLC, DCS, fieldbus, or wireless monitoring systems for continuous pressure measurement and process control.

How to Select a PDS813 Flush Diaphragm Pressure Transmitter

When selecting a PDS813 pulp and paper pressure transmitter, confirm the following details:

1. Process medium
   Confirm whether the medium is pulp, slurry, coating liquid, viscous fluid, sticky medium, crystallizing liquid, or sediment-containing liquid.
2. Measuring range
   Confirm normal operating pressure, maximum pressure, and calibrated range. The PDS813 measuring range covers 0–6.3 MPa.
3. Process connection
   Confirm the required special process connection size, installation structure, and whether the diaphragm needs to be flush with the pipe inner wall.
4. Diaphragm and wetted material
   Select suitable diaphragm and process connection materials according to medium corrosion, abrasion, and compatibility.
5. Process temperature
   Confirm process temperature. For high-temperature media, verify whether the seal structure, filling fluid, or cooling arrangement is suitable.
6. Output signal
   Select 4–20 mA + HART, PROFIBUS PA, FOUNDATION Fieldbus FF, WirelessHART, or ZigBee according to control system requirements.
7. Accuracy requirement
   Confirm whether standard ±0.04% FS accuracy is suitable or whether the highest accuracy option is required.
8. Installation position
   Check whether the transmitter can be installed in a position where the diaphragm remains properly exposed to the process medium and can be maintained conveniently.
9. Explosion-proof requirement
   For hazardous areas, confirm the required explosion-proof certification or project standard.
10. Accessories
    Confirm whether special adapters, gaskets, mounting accessories, cable glands, or cleaning arrangements are required.

PDS813 Flush Diaphragm Pressure Transmitter vs Standard Threaded Pressure Transmitter

For clean water, air, gas, or non-viscous liquids, a standard pressure transmitter may be sufficient. For pulp, slurry, high-viscosity media, or easy-to-block process conditions, the PDS813 flush diaphragm structure is usually more suitable.

Accessories for PDS813 Pressure Transmitter Installation

Depending on site conditions, the PDS813 pressure transmitter may require installation accessories such as:

• Special process adapters
• Gaskets
• Mounting brackets
• Explosion proof cable glands
• Instrument valves
• Cleaning or flushing accessories
• Tube fittings and installation hardware

For paper-making and slurry applications, the installation structure should avoid dead corners and narrow passages as much as possible to reduce material accumulation.

PDS813 Pulp and Paper Pressure Transmitter Supplier Support from SIYelectric

SIYelectric supplies PDS813 pulp and paper pressure transmitters for industrial projects, replacement orders, and process instrumentation procurement. We can help check model codes, review datasheets, confirm process connection requirements, match installation accessories, and prepare quotations based on actual operating conditions.

For accurate quotation, please provide:

• process medium, such as pulp, slurry, coating liquid, or viscous fluid
• normal pressure and maximum pressure
• required measuring range
• process temperature
• process connection size and installation form
• diaphragm and wetted material requirement
• output signal requirement
• display and electrical connection requirement
• explosion-proof or certification requirement
• required accessories or installation conditions

SIYelectric can also support related pressure transmitter accessories such as gaskets, special adapters, mounting brackets, explosion-proof cable glands, valves, fittings, and installation hardware.

Available documents may include technical datasheet, certificate of conformity, inspection report, packing list, and commercial invoice, depending on the project and order requirements.