A Manual Air Intake Shutoff Valve is operated by a lever or handle to quickly block the engine’s air intake. This simple and reliable design allows operators to manually shut down the engine during emergencies.
About ISOV
The ISOV valve is a positive spring operated air intake shutoff valve that provides emergency overspeed shutdown of a diesel engine. Mechanical failure or the presence of combustible vapors like hydrocarbons in the engine’s intake system may cause the engine to overspeed beyond control, causing severe damage to the engine or even explosion.
Applications
We offer the most comprehensive and diverse line of positive air shutoff valves.
In addition, our installation and activation kits are specifically engineered for your application.
ISOV manufactures engine overspeed shutdown devices for every application, of which some typical are listed below:
Drilling Rigs (Onshore & Offshore)
Drilling Support Equipment
Well Servicing Equipment
Refinery Support Equipment
Bulk Haulers and Tankers
Mining
Construction
Material Handling
Generator Sets
Air Compressors and many more
Trains
Valve Actuation Types
An Electric Air Intake Shutoff Valve uses an electrically actuated mechanism to quickly close the air intake during an emergency shutdown. When triggered, it stops airflow to the engine, preventing overspeed or runaway and ensuring safe engine shutdown. Ideal for automated safety systems and remote shutdown applications.
A Failsafe Air Intake Shutoff Valve automatically closes when power, pressure, or control signals are lost, cutting off the engine’s air supply to safely stop the engine. It helps protect against diesel engine runaway in hazardous conditions.
A Pneumatic Air Intake Shutoff Valve uses compressed air to quickly close the valve during an emergency shutdown, blocking the engine’s air intake and stopping the engine. It is ideal for hazardous environments using pneumatic control systems.
Special Features of ISO Valve
Special Features of ISO Valve
Material & Finishing
ISOV castings and internal parts can be produced using non-standard materials to meet specific customer requirements, particularly for the OEM market. This flexibility is necessary to address the demands of high temperature inlets and challenging climatic conditions. For instance, ISOV castings can be manufactured using stainless steel or even hastelloy if needed. Moreover, various surface treatments like anodizing and powder coating are also offered to enhance the quality and durability of the products.
Custom Flanges & Adapters
At ISOV we produce custom flanges to make it compatible to a wide variety of inlet pipings. We do this for new engines, as well as retrofit in existing engines regardless of make or age.
Typical air inlets can be:
- Hose and Clamp Connection
- O-ring Connection
- Marman Flange
- Elbow and/or Flangebolt Connection
Solenoids
Special attention is required for electrical components in Offshore and Marine Grade Constructions.
The solenoids employed in ISOV valves are produced and examined according to DIN VDE0580 standards, featuring a plug and socket connection conforming to DIN-175301-803 specifications. This design guarantees secure and dependable functionality.
Position Switch
To monitor the opening and close condition of an ISOV, two types of switches are used, Photoelectric (type D1) and Electromechanical (D2).
D2 type switches are required for Marine and Offshore applications and have an IP67 rating. Alternatively, Explosion Proof switches are used for hazardous area applications.
ISOV mechanical switches comply to European standard EN ISO/IEC 17050-1.
REMCON Remote Control
REMCON is an ISOV Valve intended for remote opening and is fitted with either an electric or a pneumatic operator to provide maximum flexibility. Depending on engine intake configuration / piping we offer both a side and a top mounted remote control operator to avoid interference with other engine parts (refer to Ordering Codes on Page 4).
Remote opening of valves is an outcome in applications such as unmanned platforms, remote engine rooms and in arctic conditions.
REMCON is also used for large size in which manual opening requires excessive force and / or difficult accessibility. ISOV’s unique Remote Control is designed to fit on bores from 100mm up to 508 mm.
REMCON Electronic controllers developed by ISOV, is a rail mounted module which can be integrated in any existing control panel.
CONSTRUCTION MATERIALS AND FINISHING
Based on customer requirements and especially for the OEM market, ISOV castings and internal parts can be manufactured in non-standard materials.
Today’s high temperature inlets and/or challenging climatic conditions may require this.
As an example, ISOV castings can be made in stainless steel and even hastelloy if required. In addition to the above a variety of surface treatments, such as anodizing, powder coating and painting options are available.
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