PMK-21TV Series 2

PMK-21TV Series 2 System Overview

The PMK-21TV Series 2 is an aircraft electromechanical program mechanism designed for control of anti-icing systems within onboard equipment of helicopters and aircraft. The unit functions as a programmed switching device integrated into blade and airframe heating system architecture.

PMK-21TV Series 2 Control Function

The mechanism provides cyclic sequential switching of heating element groups in an impulse mode, ensuring controlled distribution of electrical power and preventing overload of the onboard electrical system during anti-icing operation.

PMK-21TV Series 2 Aircraft Application

The unit is used on helicopters and aircraft equipped with anti-icing systems, including Mi-8/Mi-17 helicopters and Il-76 aircraft, where it ensures protection of rotor blades and airframe elements against icing under adverse weather conditions.

PMK-21TV Series 2 System Integration

The mechanism operates in conjunction with onboard AC and DC power systems and anti-icing control units, using a programmed cam-based mechanism to distribute power between heating circuits. Series 2 represents an improved modification with enhanced reliability of switching elements. The product is also known under alternative designations PMK-21TV Series 2 and ПМК-21ТВ серия 2.

Product Type: Electromechanical program mechanism
Function: Cyclic control of anti-icing heating elements
Application / Where Used: Aircraft and helicopter anti-icing systems
System / Installation Area: Rotor blade and airframe heating system
Compatible Aircraft / Equipment: Mi-8, Mi-17 helicopters; Il-76 aircraft
Operating Voltage (Control Circuit): 27 V DC (24–29.4 V)
Operating Voltage (Power Switching): 208 V AC
Frequency: 400 Hz
Current Consumption (DC Circuit): ≤ 1.5 A
Control Principle: Programmed cyclic switching (impulse mode)
Cycle Duration: Approximately 160–240 s
Number of Heating Groups: 4 or more groups (sequential switching)
Heating Cycle per Group: ~40 s ON / ~120 s OFF
Operating Mode: Continuous operation during icing conditions
Operating Temperature Range: −60 to +60 °C
Weight: Approximately 2.5–3.0 kg
Construction Type: Electromechanical cam-based program mechanism
Series Features: Improved contact system with increased switching reliability
Technical Documentation: Product passport and operational documentation

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.