- Vibration Monitoring
- Industrial Communications
- PLC & I/O Cards
- Automation Accessories
- Controllers & Data Acquisition
- AC Drives
- Industrial Computers
- Encoders
- Safety Switches & Guard Locking
- Isolator & Barrier
- Automation Software
- HMI Displays
- Motor Soft Starters
- Servo Drives
- CCTV & Security
- Robotics
- Pneumatic Cylinders
- Machine Vision
Brand: TopWorx
TopWorx DVR Valve Position Monitor
Description
A compact valve position monitor with two adjustable cams
The TopWorx DVR is a valve position monitor designed to indicate the open and shut state of valves or actuators on quarter-turn equipment. The installation manual says it is not suitable for multi-turn rotation equipment. Two adjustable cam assemblies with a usable range between 0 and 90 degrees operate the switches, and the unit works in normal-acting and reverse-acting arrangements with the indicator assembly accommodating both.
Technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / model | TopWorx (Emerson) DVR valve position monitor |
| Function | Monitors open and shut state of a valve or actuator |
| Rotation | Quarter-turn; not suitable for multi-turn equipment |
| Cams | 2 adjustable cam assemblies, usable range 0 to 90 degrees |
| Switch option M2 | Mechanical SPDT switches, not sealed; 10 A at 125 VAC or 250 VAC; conforming to UL 1054 |
| Terminal wire size | 2.5 mm2 / 10 AWG maximum |
| Insulation resistance | 500 megohms minimum at 500 VDC |
| Enclosure and dome | Lexan 123R, UV F1 rated |
| Fasteners | 304 stainless steel standard; 316 stainless steel optional |
| Shaft / seals | 316 stainless steel / silicone |
| Cable entries | Two molded entries, IP6X glands and blanking plugs required |
| Lid screw torque | 1.41 N-m (200 in-oz) |
| Mounting hole torque | 5.4 N-m (4 ft-lb) +/- 10% |
| Area classification | No approvals: for areas free from flammable gas, vapor or dust-air mixtures |
Setting the cams
In normal acting, the valve is turned full clockwise to the closed position, the bottom cam is pulled towards the spring side and rotated until the first switch operates, then the valve is turned to open and the top cam is set for the second switch. Reverse-acting units reverse the open and closed positions. The cams are spring loaded and may eject forcefully when taken apart, so they should not be disassembled in normal operation. A continuity check between the normally open and common wires can be used to set M2 switches.
What to confirm before ordering
Confirm the actuator mounting pattern and bracket kit, normal or reverse action, the switch option, cable entry and gland size, and the area classification, because the DVR carries no hazardous-area approval. TopWorx notes that numerous mounting bracket kits are available, including direct NAMUR mounting, and that the installer must provide permanent sealing devices for the conduit entries.
Documents and quotation
The TopWorx DVR installation, operation and maintenance manual ES-09462-1 (October 25, 2022) is hosted on this page. See Valve Positioners for other valve position products. Send model code, quantity and mounting details for a quotation.
Datasheets & Documents
- Manual TopWorx DVR IOM ES-09462-1 (Oct 25, 2022) Download
Reviews (0)
About brand
TopWorx is the valve controls and limit switch brand of Emerson, based in Louisville, Kentucky, USA. Its products mount on valve actuators to show whether a valve is open or closed, send switch or analog signals back to the control system and, in some models, operate the actuator pilot valve. Seven Star LLC, an independent supplier in Muscat, lists products from the manufacturer's manuals and datasheets and quotes against the exact model code.
TopWorx product groups
The documents on this site cover GO Switch leverless limit switches, the D-Series, TX-Series, TV-Series and K-Series discrete valve controllers, the DVR valve position monitor and the PD Series smart valve positioner. Options in these documents include GO Switch, mechanical and inductive sensors, 4-20 mA and HART transmitters, FOUNDATION Fieldbus, AS-i, DeviceNet and PROFIBUS communication, integrated pilots and explosion-protected enclosures.
Ordering TopWorx products: what we need
Send the full model code from the nameplate or the datasheet nomenclature, the actuator make, mounting pattern and size, the supply voltage and signal type, the hazardous-area certification and the quantity. Many options cannot be combined, so we confirm the code against the manufacturer's documentation before quoting.
Related products
Frequently Asked Questions
What does the DVR monitor?
The open and shut position of a valve or actuator on quarter-turn equipment.
Can it be used on multi-turn equipment?
No. The manual states it is not suitable for multi-turn rotation equipment.
What switches are available in the manual?
Option M2: SPDT mechanical switches rated 10 A at 125 VAC or 250 VAC to UL 1054.
What is the housing made of?
Lexan 123R UV F1 rated enclosure and dome, with 316 stainless steel shaft and silicone seals.
Is it approved for hazardous areas?
No. The manual states it has no approvals and is for areas free from flammable gas, vapor or dust-air mixtures.
Reviews
There are no reviews yet.