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OPD Valves

On the outside of the cylinder there is a gadget called the OPD, the overfill prevention gadget. Inside the tank is this gadget that acts as a float. It floats to the top when the tank has reached maximum capacity. 

The propane distributor has a mathematical formula that is utilized to establish that the tank is full. The container knows that the tank is full when a white mist is transmitted out of a small opening on the OPD valves. 

The overfilling prevention gadget has upset and greatly increases the safety of utilizing propane cylinders at home or in a business. The gadget actually stops the filling cycle when propane tanks are about 80 percent full. 

This is important because it leaves sufficient space in the tank to allow for the expansion and contraction of fuel when the tanks are presented to different temperatures.


  • The OPD valves were first introduced on October 1, 1998
  • It is designed to prevent cylinder overfilling.
  • OPD valves help in stopping the flow of gas.
  • This device is beneficial in leaks.
Bestseller No. 1
Rotarex 40 lb. LP OPD Valve with 7.0 Dip Tube - Propane - Grill - Cooking - Heating - Camping
  • 7.0 Dip Tube
  • 3/4" 14 NGT Connection
  • 375 PSIG Relief Setting
  • Type 1 ACME and POL
  • Compatible with 40# LP
Bestseller No. 2
New 20 lb Steel Propane/LP Cylinder with OPD Valve
  • New steel 20 lb capacity propane / LP tank
  • OPD valve
  • Shot-blasted and powder coated for durability
  • Carry handles
  • Ships empty
Bestseller No. 3
Welding Torch Fueled By 20 lb Propane With Type 1 Valve, OPD Valve
  • HEIGH TEMPERATURE RESISTANCE| Stainless steel head has a heigher melting...
  • WITH 60 INCH HOSE| Heigh ressure
  • Suite for liquid propane gas cylinder
  • For type 1 valve, OPD Valve
  • MONEY-SAVER | It use propane tank with OPD valve, this gas is cheaper than...
Bestseller No. 4
  • Nashfuel
Bestseller No. 7
Marshall Excelsior (ME952-07 LP OPD Filler Valve Dust Cap and Strap
  • MARSHALL EXCELSIOR LP OPD Filler Valve Dust Cap and Strap - Designed to...
  • Using a cap will reduce the likelihood of inadvertent damage to the...
Bestseller No. 8
OPD Propane Tank Valve Removal Tool
  • Fits over hand wheel for removal
  • Breaker bar required for tool, not inlcuded
Bestseller No. 9
Flame King MT301 Mr. Tank 30 LB Pound Steel Propane Cylinder with Type 1 OPD Valve, White
  • Safety first - Mr. Tank tanks are Pre-purged vacuum ready for filling with...
  • High quality - each tank is constructed from high grade Welded Steel and...
  • Premium valve - Premium OPD (overfilling prevention device) valve assembly...
  • Leading the industry - Mr. Tank, a leader in propane storage solutions,...
  • Suit your needs - With a standard-size connection valve, This large 30lb...
  • NOTE: The propane tank is empty and ready to be filled with gas
Bestseller No. 10
Timsec 10Pcs QCC1 Dust Caps for Propane Adapter and Gauge Fitting, Propane Tank OPD Filler Valve Dust Cap Strap, QCC1 Thread Protection Sleeve Covers (1.32" Inner Diameter)
  • [MATERIAL] - The QCC1 Propane Dust Caps are made of high-quality plastic...
  • [FUNCTIONS] – The QCC1 male thread Protection Sleeve Caps will reduce the...
  • [COMPATIBILITY] – The filler valve dust caps and straps are designed to...
  • [EASY TO INSTALL] - The dust caps can be installed by hands, protecting the...
  • [PACKAGE INCLUDES] – The QCC1 thread protection sleeve caps include 10pcs...

Last update on 2021-07-23 / Affiliate links / Images from Amazon Product Advertising API

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