Black Widow 1/2" Electric Air Valve

16mm Orifice


19 reviews

Suggested Addons
Add Gold Extended Warranty Tooltip
1 year add-on to existing warranty. Does NOT cover accidental damage, no advanced replacement.
Click here for more information!
+See price at checkout
Add Platinum Extended Warranty Tooltip
2 year add-on to existing warranty. DOES cover accidental damage and advance replacement.
Click here for more information!
+See price at checkout


The golden standard of solenoid valves, our Black Widow 1/2" Electric Valve gives you the high-flow performance needed to get the best out of your train horns and any other pneumatic accessories. Featuring a huge 16mm orifice, our 1/2" valve is made specifically to get the most volume out of your horns. Forged from solid stainless steel with all metal components, our stainless steel HornBlasters solenoid valve is designed to stand the test of time.

Our Black Widow 1/2" valve is a direct replacement valve for the following train horns:

  • High Flow 16mm Orifice
  • Heavy Duty All Stainless Steel Valve Case
  • Designed For Performance Applications
  • 2-Year Manufacturers Defect Warranty
  • HornBlasters Black Widow 1/2" Electric Air Valve
  • Part Number: VA-8H
  • Port Size: ½″ NPT Female
  • Orifice: 16mm
  • Flow Rate: 5.5 Cv
  • Body Material: Stainless Steel
  • Minimum PSI: 3 PSI
  • Maximum PSI: 217 PSI
  • Voltage: 12 Volts DC
  • Money-Back Guarantee/Refund Policy
    All merchandise unless otherwise indicated may be returned within 30 days from the shipment arrival date for a refund. A Returned Merchandise Authorization (RMA) number is required for all returns. A 15% restocking fee may apply. Additional deductions may be made to reflect the products current market value. These terms apply to all refunds. Most products are shipped with a refund/replacement guarantee period unless otherwise noted in the product listing. Customers must inform of any order discrepancy within 7 days from the invoice date so that we may investigate and resolve the situation accordingly.
  • Warranty
    This product is backed with a 2-year Manufactures defect warranty!
  • satisfaction guarantee offers our customers a 30-day satisfaction replacement or refund guarantee on all purchases, except when otherwise noted in the product listing.
  • Cross-Shipments will not cross-ship returned merchandise.
  • Physical Damage Policy
    Physical damage to any product purchased at will effectively void warranty coverage. Physical damage includes but is not limited to improper handling and/or any other type of damage sustained by irregular usage.

Warnings & Notices

Safety warning icon

This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to

Customer Reviews

4.9 Based on 19 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Customer Photos
Write a Review Ask a Question

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
Marino L.
United States United States

Solenoid valve

Had to replace my original one due to initial installation location. I have to say this new one is a solid quality part. Swapping it out was a breeze and my system works like brand new once again. Tech support went above and beyond in explaining the electrical end of the system. They saved me time and money and I greatly appreciate that. Thanks again!

Jose M.
United States United States

Great service

I finally got it installed yesterday and horn is working again never a disappointment thanks alot


This Is The One To BUY!

My horn is a single 24" trumpet like on an 18-wheeler. I'm running 150 psi tank pressure. I went through 2 of the cheap 1/4" horn valves in 2 years. They just quit working after 11 months each. I upgraded to the Widowmaker, and increased the size of the tubing from tank to valve. The difference is incredible! The horn blew OK as long as the old valves were working, but now, it's startlingly loud! It seems that even 1 horn benefits from unrestricted air flow.


Replace parted

Thanks again. Horns work again


Great customer service

The products are great and loud AF!