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Brand: Flowserve
Flowserve Logix 3800e Digital Positioner
Description
Flowserve Logix 3800e digital positioner overview
The Flowserve Logix 3800e is a value-oriented digital positioner for single- and double-acting linear and rotary valves. It is built on the platform of the Logix 3800 and shares its form and fit, but with a simpler diagnostic set to keep cost down. One-button setup configures zero, span and gain in under a minute on most valves. Seven Star LLC supplies the Logix 3800e in Oman and the GCC as an independent supplier in Muscat; this page condenses the manufacturer brochure and installation manual to help with your enquiry.
The positioner is sold in HART and non-communicating versions. The installation manual refers to the 381Xe (no communication) and 382Xe (HART), with the Logix 3820e HART unit described in detail, and to explosion-proof, intrinsically safe and general-purpose housing options.
Logix 3800e technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Flowserve / Logix 3800e digital positioner |
| Actuators | Single- or double-acting, linear and rotary |
| Command signal | 4-20 mA, two-wire, loop powered; HART 6 and 7 on the HART version |
| Compliance voltage / minimum current | 10 VDC plus line losses; 4.0 mA minimum operating current |
| Air supply | 1.5 bar (22 psi) to 10.3 bar (150 psi); ISA 7.0.01 quality |
| Output air capacity | 30.6 Nm³/h at 4.1 bar (approximately 18 SCFM at 60 psi) with the double-acting relay |
| Linearity / hysteresis | ±1.25 % / 1.0 % or better |
| Sensitivity / stability | 0.25 % or better / 0.4 % or better |
| Resolution / repeatability / deadband | 0.25 % / 0.25 % / 0.3 % |
| Temperature range | −40 to 85 °C (−40 to 185 °F) per brochure |
| Housing | Cast, powder-painted copper-free aluminium; IP66 / Type 4X; plastic cover option for general purpose |
| Weight (base, aluminium) | 4 kg (8.8 lb) |
| Feedback shaft rotation | 15 to 110 degrees with spring bias; up to 180 degrees without |
| Safety | Explosion-proof, intrinsically safe, non-incendive; SIL 3 capable |
One-button setup and the controls of the Logix 3800e
The quick-calibration feature is the main commissioning aid. The technician checks mounting, linkage and tubing, applies air and loop current, and starts the calibration routine, which sets zero, span and gain automatically. Local switches then adjust behaviour. The HART installation manual lists a HART protocol switch (version 6 or 7), a signal-at-closed switch (4 mA or 20 mA) and a valve stability switch that tunes for low-friction or high-friction valves.
The positioner can also be tuned to suit sticky actuators and unusual valve types, and it can be retrofitted to valves from other makers. Flowserve also states that the positioner works with 24 V solenoid valves suited to the application.
Housing, relay options and hazardous-area markings of the Logix 3800e
Three housings are offered: an explosion-proof housing, an intrinsically safe housing with aluminium cover, and an economical plastic-covered version for general-purpose use. The manual lists explosion-proof markings of Ex db IIC T6 to T4 Gb for ATEX and IECEx, and Class I Div 1 Groups B-D in North America, with intrinsically safe protection up to Ex ia IIC. The tables show T4 to T6 temperature classes with ambient limits that fall as the temperature class tightens.
| Protection | Marking in the manual |
|---|---|
| Explosion-proof (XP) | Ex db IIC T6…T4 Gb; Class I Div 1 Groups B-D; dust Ex tb IIIC T105 °C Db |
| Intrinsically safe | Ex ia IIC T6…T4 Ga; Class I, II, III Div 1 Groups A-G |
| Non-incendive / non-sparking | Class I, II, III Div 2; Ex nA IIC, Ex ec IIC Gc |
| Enclosure | Type 4X, IP66 |
| Temperature classes | T4 to +85 °C, T5 to +55 °C, T6 to +45 °C |
The label on the unit and the certificate it refers to decide what is permitted at a site, so supply the label data when ordering a replacement.
Both single-acting and double-acting relays are covered in the manual. The double-acting relay delivers about 30.6 Nm³/h at 4.1 bar, whereas the single-acting relay delivers about 15.3 Nm³/h at 4.1 bar. A low-bleed double-acting relay is also listed for consumption-sensitive installations. Air consumption is quoted per relay, for example 0.637 Nm³/h at 4.1 bar for the standard double-acting version, and the manual tells users to supply clean, dry, oil-free air or an acceptable gas such as nitrogen or sweet natural gas; sour gas is not allowed.
Logix 3800e compared with related positioners
| Model | Actuator | Command / protocol | Notes |
|---|---|---|---|
| Logix 3800e | Single or double | HART 6/7 or none; 4-20 mA | XP, IS, general purpose housing; SIL 3 capable |
| Logix 3800 | Single or double | Full diagnostic set (parent platform) | Same form and fit as the 3800e |
| Logix 520MD+ | Single or double | HART 5/6/7 | Piezo, tiered diagnostics, -52 °C rating |
| Logix 1500 | Single only | Analog or HART 7 | Compact IS unit |
| Logix 3400MD | Single or double | Foundation Fieldbus | Piezo, local setup |
Logix 3800e selection and ordering checklist
- Communication: non-communicating 4-20 mA (381Xe) or HART (382Xe).
- Housing: explosion-proof, intrinsically safe with aluminium cover, or plastic cover for non-hazardous areas.
- Actuator action and relay: single or double acting, standard or low bleed.
- Mounting: linear (stroke length), rotary, FlowTop or NAMUR, and whether direct mount is used.
- Area certification code and temperature class printed on the nameplate.
- Options such as analog position output and the RedRaven asset-health connection.
Installing and maintaining the Logix 3800e
Follow the manual for conduit and air thread types, because mixing threads can damage the housing and invalidate its certification. The unit is not rated IP66 / Type 4X until covers and plugs are properly installed. Wire the loop in shielded cable with the shield grounded at the source, use HART-compatible barriers where applicable, and check that the compliance voltage of the controller is sufficient at 20 mA.
The Logix 3800e is more limited in diagnostics than the Logix 3800, but it still reports alarms and, when connected to the RedRaven platform, supplies asset health data for condition-based maintenance. A common spare strategy is to hold one complete positioner per valve family and to keep spare covers, seals and filters.
Typical Logix 3800e applications in Oman and the GCC
Flowserve points to oil and gas, petrochemical, and pulp and paper service for the Logix 3800e, and similar duties exist across the Gulf: upstream oil and gas facilities, gas plants, refineries, power and water utilities. The explosion-proof housing is relevant for classified process areas; the plastic-cover version suits non-hazardous utility valves. For hot outdoor locations select the correct temperature class, and consider shading.
Information to send with a Logix 3800e RFQ
- Quantity and the existing positioner label or model code.
- HART or non-communicating version, and the control system in use.
- Housing type and hazardous-area certification required.
- Actuator type, single or double acting, mounting standard and stroke.
- Options such as analog position output.
Documents and quotation
The Flowserve Logix 3800e brochure is attached to this page with its summary specifications. Send the part number and the details above to Seven Star LLC and we will reply with a quotation for supply to Oman and the GCC.
Other Models in the Flowserve Logix Positioners Range
Seven Star LLC supplies models from the Flowserve Logix Positioners range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Flowserve Logix 520MD+ HART Digital Positioner | Valve Positioners | View details |
| Flowserve Logix 3400MD Fieldbus Digital Positioner | Valve Positioners | View details |
| Flowserve Logix 1500 Compact Digital Positioner | Valve Positioners | View details |
| Flowserve Logix 3800e Digital Positioner | Valve Positioners | You are viewing this model |
Datasheets & Documents
- Catalog Flowserve Logix 3800e Brochure Download
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About brand
Flowserve is the American flow control company for pumps, valves, mechanical seals and valve automation, known through brands such as Durco, Worthington, Byron Jackson, Valtek, Limitorque, Worcester, Logix and Argus. It was formed on 22 July 1997 by the merger of equals of Durco International and BW/IP, whose heritage reaches back to Simpson & Thompson (1790) and Byron Jackson (1872). Flowserve Corporation is headquartered in Irving, Texas, and listed on the New York Stock Exchange.
Seven Star LLC sources and supplies Flowserve pumps, seals, control valves, ball valves, actuators and positioners for process plants in Oman, working from the nameplate data and the manufacturer's documentation.
Flowserve company profile
| Formed | 22 July 1997, merger of Durco International and BW/IP |
|---|---|
| Heritage companies | Simpson & Thompson, later Worthington Simpson (1790); Byron Jackson (1872); Duriron foundry, later Durco (1912) |
| Headquarters | Irving, Texas, USA |
| Ownership | Flowserve Corporation, public company (NYSE: FLS) |
| Product families | API and ANSI process pumps, Durco and Worcester ball and plug valves, Durco TX3 triple-offset and Valtek butterfly and globe control valves, Limitorque electric actuators, Logix positioners, mechanical seals |
Milestones
- 1790: Thomas Simpson founds Simpson & Thompson, a predecessor of Worthington Simpson pumps.
- 1872: Byron Jackson is founded, a root of BW/IP.
- 1912: The Duriron foundry, later Durco, is launched.
- 1997: Durco International and BW/IP merge on 22 July to form Flowserve, listed on the NYSE as FLS.
Flowserve product families listed here
Flowserve pumps on this page are the Durco Mark 3 ANSI process pump and the ECPJ vertical sump pump built to API 610 type VS4. Sealing products are the ISC2 cartridge mechanical seal to API 682 and DuraClear barrier fluid for dual seal systems. Flowserve valves include the Valtek Mark One globe control valve, Argus floating and trunnion-mounted ball valves (EK71, FK79, FK76M) and Durco Microfinish ball valves. Automation is covered by Limitorque MX and L120 multi-turn electric actuators, the Rotadisk RD and RDF pneumatic actuator and the Logix 3800 digital positioner.
Where Flowserve equipment is used
Mark 3 pumps handle acids, caustic, solvents and utilities in chemical and petrochemical units. VS4 sump pumps drain pits and collection tanks. Valtek control valves and Argus ball valves are found in refining, gas processing, power and desalination, and Limitorque actuators operate gate and globe valves on pipelines, tank farms and water networks across the GCC.
Flowserve products we list
Ordering Flowserve parts: what we need
The serial number on the nameplate is the key to Flowserve records for a pump, valve or actuator. Please add the following by product type:
- Pumps: size and model, impeller diameter, materials, seal arrangement, and the part name and item number from the sectional drawing
- Mechanical seals: seal type and size, drawing or part number, materials code, pumped fluid and flush plan
- Valves: size, pressure class, body and trim materials, end connections, and the actuator and positioner model
- Limitorque actuators: unit size, order and serial number, supply voltage, wiring diagram number
Facts checked against Flowserve's SEC filings and published company histories, October 2026.
Browse Flowserve products by category: Control Valves, Pumps, Valve Actuator, Valve Positioner.
FAQ
Questions about the Flowserve Logix 3800e Digital Positioner
Answers from our engineering team on installation, compatibility and integration.
01What is the Logix 3800e?
It is a cost-competitive digital positioner from Flowserve that shares the platform and form of the Logix 3800 but with a simpler diagnostic set. It supports single- and double-acting linear and rotary valves.
02How long does setup take?
The brochure states that the one-button setup configures zero, span and gain for most valves in less than 60 seconds.
03Which communication options are available?
The HART version supports HART 6 and 7 with 4-20 mA, and a non-communicating version is also described. The brochure also lists discrete I/O signals for the range.
04What housings can I order?
There are explosion-proof, intrinsically safe and plastic-cover general-purpose housing options. The protection class is IP66 / Type 4X when properly installed.
05What is the air capacity of the Logix 3800e?
The brochure gives 30.6 Nm3/h at 4.1 bar for the double-acting relay. The installation manual lists a lower capacity for the single-acting relay.
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