Brand: OEM (Unbranded)

Solenoid Valve type: 859xxxx.8901.11000

Name: Solenoid Valve 859xxxx.8901.11000 2/2 NC ATEX | Seven Star
Brand: OEM (Unbranded)

Description

Overview

The solenoid valve 859xxxx.8901.11000 is a 2/2-way normally closed industrial solenoid valve certified for hazardous area service, with an ATEX Ex de IIC T5 Gb rating and DN25 body with 1 inch NPT connections.

Designed for on-off control of compatible gases and liquids, the valve operates from 0 to 40 bar working pressure with fluid temperatures from -40°C to +90°C, making it suitable for demanding process and safety applications.

Engineering & Design

The valve combines a DN25 two-way body with flange-type coil enclosure rated Ex de IIC T5 Gb, covered by explosion protection certificate PTB 03 ATEX 1040, and an IP65 enclosure with an M20×1.5 cable gland for 8 to 11.5mm cables.

Sealing is provided by NBR-K elastomers rated for broader chemical and temperature compatibility, with maximum ambient temperature +40°C for the complete certified assembly.

Key Features

2/2-way normally closed valve function
ATEX Ex II 2G Ex de IIC T5 Gb and Ex II 2GD T130°C/T95°C Db certified
Explosion protection certificate PTB 03 ATEX 1040
DN25 body with 1 inch NPT connection
Working pressure 0 to 40 bar
Fluid temperature -40°C to +90°C
NBR-K seals for media compatibility
IP65 protection with M20×1.5 cable gland (8–11.5mm cable)
Optional Namur position sensor to DIN EN 60947-5-6 (Ex ia)
Max ambient temperature +40°C

Applications

Pneumatic actuation in hazardous areas
Oil and gas utility and process island duty
Chemical plant on-off control
Zone 1 and Zone 2 safety applications

Specifications

Valve Function	2/2-way, normally closed (NC)
Body Size	DN25, connection 1 inch NPT
Working Pressure	0 to 40 bar
Fluid Temperature	-40°C to +90°C
Ambient Temperature	Max +40°C
Seals	NBR-K
Explosion Protection	Ex II 2G Ex de IIC T5 Gb; Ex II 2GD T130°C/T95°C Db
Certificate	PTB 03 ATEX 1040
Enclosure Protection	IP65, gland M20×1.5 for 8–11.5mm cable
Position Sensor (Option)	Namur type to DIN EN 60947-5-6, Ex ia

Compatibility & Integration

The valve mounts directly into process piping via 1 inch NPT connections and interfaces with Namur-type position sensors and Ex ia proximity switches for valve position feedback into control systems.

Valve Support

Seven Star LLC supports coil voltage selection, media compatibility review, and Namur position feedback configuration for pneumatic actuation systems in classified areas.

Our specialists assist with spares planning and cross-referencing to sustain safe operation of your process valves across the Gulf region.

Operational Benefits

The certified Ex de construction of this solenoid valve provides safe, dependable on-off control in Zone 1 and Zone 2 areas without the cost and complexity of alternative actuation methods.

Its wide pressure and temperature envelope covers common process utility duties, and the NBR-K seals simplify media selection for standard industrial fluids.

Optional Namur position feedback delivers valve status to the control system for improved process visibility.

The certified construction and documented explosion protection certificate simplify hazardous area compliance for plant operators and inspectors.

For hazardous area service where the solenoid valve 859xxxx.8901.11000 must operate dependably, Seven Star LLC supplies it with certificate documentation, and we verify every unit before dispatch.

The solenoid valve type 859xxxx.8901.11000 provides the pneumatic pilot function for the control valve actuator, and the valve covers the standard voltage and the hazardous area coil options.

The valve is mounted on the actuator top, and the manual override provides the local operation for the commissioning.

The solenoid valve 859xxxx.8901.11000 is a direct-acting unit that converts the electrical signal into the pneumatic pilot pressure of the actuator. Selection is based on the coil voltage, the port size and the ambient temperature of the installation, and the valve is fitted with the DIN connector for the standard field wiring. The unit is used for the pneumatic control loops of the process plants and is supplied with the coil matched to your control voltage.

Why Seven Star LLC

Seven Star LLC supplies certified hazardous area solenoid valves from our Muscat, Oman facility, with certificate documentation for projects across the GCC oil, gas, and chemical industries.

Our specialists help confirm valve function, coil voltage, and certification requirements to ensure site compliance.

Identifying the Exact Valve Variant

In the type designation 859xxxx.8901.11000, the characters marked xxxx stand for model-specific digits, so the complete type number must be taken from the valve nameplate before ordering. Along with the full type number, check the coil voltage and whether it is AC or DC, the coil power, the connection size and the Ex marking. Also check whether the installed valve carries the optional Namur position sensor. When a coil or complete valve is replaced in a hazardous area, the replacement must carry the same or an equivalent certification as the original.

Installation in Hazardous Areas

Install the valve with the flow arrow in the direction of flow, and flush the pipework before fitting it. Weld spatter and debris are a common cause of seat leakage in new installations.
Fit a strainer upstream where the medium may carry particles.
Terminate the cable using the certified M20×1.5 gland with a cable diameter inside the 8 to 11.5 mm clamping range. Any unused entries must be closed with certified blanking plugs.
Connect the earthing terminal and follow IEC 60079-14 and your site’s hazardous area installation rules. Keep the certificate and the installation record for the Ex register.

Commissioning and Function Testing

Before start-up, confirm that the supply voltage matches the coil nameplate, then energise the coil and check that the valve opens fully and closes tightly with pressure applied. If the Namur position sensor is fitted, check its signal at the control system in both positions. For shutdown and safety duties, record the test for the proof-testing programme.

Maintenance and Troubleshooting

Common faults include coil burnout from wrong voltage or high ambient heat, and seat leakage from debris or worn NBR-K seals. A valve that does not open can have low differential pressure if it is a pilot-operated design, or a blocked pilot orifice. Seal kits and coils should be matched to the full type number. Work on Ex equipment must be done by competent personnel and must not change the protection concept.

Applications in Oman and the GCC

Ex-certified 2/2-way valves like this solenoid valve 859xxxx.8901.11000 are used for instrument air, fuel gas, water and hydraulic duties on wellhead control panels, compressor packages and process skids across Oman and the GCC. Seven Star LLC supplies hazardous area solenoid valves and matching spares to operators and contractors in the region.

Request a Quote for Solenoid Valve type: 859xxxx.8901.11000

For the solenoid valve 859xxxx.8901.11000 or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your valve size, actuation and process data, and our specialists will respond with a detailed commercial proposal and the official solenoid documentation.

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About brand

This page groups the items Seven Star LLC lists without a manufacturer brand: parts with no maker's name on the nameplate, or parts that were requested by description, drawing or part number only. The listings are mixed. They include panel voltmeters, a temperature transmitter with flameproof housing, a solenoid valve, an industrial speed sensor and an inspection kit for a screw compressor.

Buyers in Oman can send us requests of this kind for identification and sourcing.

What is listed under OEM (Unbranded)

Panel instruments: flush-mounting AC voltmeters and a digital temperature controller
Field devices: a temperature transmitter with FLP housing, a speed sensor, a solenoid valve
Machinery items: an annual inspection kit for a Howden WRV(H) 204 compressor and a mobile water filtration system
Electronics: a control card and a portable power unit

Identification comes first

With no brand to rely on, the specification is the only definition of the part. Our first step is to find out who made the original, using the part number, the markings and the equipment it came from. When the maker can be identified, we quote the item under that maker's name and type code. When it cannot, we quote strictly against the data you supplied and say so in the offer. We do not present an unidentified part as equal to a branded one.

Sending an unbranded part request: what we need

Photos of the part and of every label or stamp on it are worth more than a long description. Add the part number, the main dimensions, and the electrical data: supply voltage, signal type and measuring range. For valves and sensors give the thread or process connection and the material. For items used in a hazardous area, send the marking shown on the housing. For machinery kits, give the machine model, mark and serial number. Plants elsewhere in the GCC can send the same data.

Browse OEM (Unbranded) products by category: Automation Accessories, Controllers & Data Acquisition, Sensors & Transmitters, Temperature Instrumentation, Electrical & Power Modules.