ZOK 27 MIL-PRF-85704C Gas Turbine Compressor Cleaning Fluid 

NSN: 7930-01-398-1013

ZOK 27 is a high-performance, water-based, biodegradable cleaning fluid specifically engineered for the heavy-duty cleaning of gas turbine compressors. Developed originally for the UK Ministry of Defence, it has become the gold standard in the aviation, marine, and power generation industries. Unlike standard detergents, ZOK 27 combines a powerful non-ionic surfactant package with a sophisticated corrosion inhibitor, allowing engines to be cleaned and protected in a single operation.

Features:

• Dual Action: Cleans and inhibits corrosion simultaneously; no separate rinse step is required unless specified by the OEM.
  
• On-Line & Off-Line: Fully approved for On-Crank (Cold) and On-Line (Hot) washing, extending intervals between major overhauls.
  
• Eco-Friendly: Biodegradable, non-flammable, and neutral pH ($7.2 - 7.5$); safe for operators and the environment.
  
• Military Grade: Qualified to MIL-PRF-85704C Type II (Concentrate) and Type II RTU (Ready-to-Use).
  
• Material Safety: Non-corrosive to aircraft materials; no adverse effects on synthetic turbine oils or blade coatings.

ZOK 27 is trusted by global operators of Boeing, Airbus, and helicopter platforms, as well as industrial giants like GE, Rolls-Royce, and Siemens:

• Aviation Turbine Maintenance: Used on both fixed-wing and rotary-wing aircraft to maintain peak thrust and reduce fuel burn.
  
• Offshore & Marine Operations: The integrated corrosion inhibitor is critical for turbines operating in high-salinity environments (salt spray).
  
• Power Generation: Maximizes power output for land-based turbines by preventing long-term compressor fouling and "slugging."
  
• Instant Restart Capability: Because it leaves a protective film, engines can be left ready for an immediate restart after washing, increasing operational readiness.

Specification:

• MIL-SPEC#: MIL-PRF-85704C 
• DEF STAN - British Spec#: 79-18
  
• Pratt & Whitney PN/Spec#: PWC11-003D
  
• Rolls Royce PN/Spec #: MSRR 9914
  

• All in-stock orders are processed within 1–2 business days (excluding weekends and holidays) after receiving your order confirmation email.
• Orders with a lead time will ship according to the estimated shipping time shown on the product page.
• If we experience a high volume of orders or if an item is backordered, processing times may be slightly delayed. We will notify you promptly via email.

• Returns and damage claims must be made within a maximum of 3 business days after receiving the product, with prior authorization from Aircraft Shop Supply (Return Material Authorization - RMA). Returns without prior notice or written authorization will not be accepted. We strongly recommend inspecting the product upon delivery; many products require special storage conditions for which we are not responsible once they arrive to the client's facility. Please review the product's SDS for proper storage and handling.
• For products with 3 to 6 months of remaining shelf life, claims must be made within the next 2 business days after receipt.
• Returns are not accepted for products with less than 3 months of remaining shelf life.
• Returns are not accepted for products purchased during a low Shelf Life promotion, items sold with discounts, or special orders that must be placed directly with the factory.
• The customer is responsible for the return shipping cost, except in cases where the return is due to an error on the part of Aircraft Shop Supply.
• Refunds will only be issued after the product has been inspected and no damage is found.
• A 25% Restocking Fee will be charged for returns of products in good condition that are either no longer needed or were ordered incorrectly.
• A 35% Restocking Fee will be charged for returns of products with one year or less of remaining shelf life.
• No Restocking Fee will be charged if Aircraft Shop Supply is responsible for incorrectly shipping a product, or if the order is damaged upon leaving the warehouse.
• Hazardous Materials & Dangerous Goods: These items are sold as final and are not eligible for return approval.