sq lp requirements

SQ08-SQ40 Mechanical Installation Manual

DO NOT use tanks for liquid propane (LP) that have been used for ANHYDROUS ammonia! This includes previously purged tanks that have been used for anhydrous. Dryer gas train components may be damaged, causing a Dryer malfunction which could lead to serious safety hazards and/or fire. Installing any tank (for an LP fuel supply to the Dryer) which has previously been used for anhydrous ammonia poses a safety threat. Brock Grain Systems will not be held liable for any purging and cleaning methods used for such tanks. If such a tank is used, this will void the Dryer Warranty.

Liquid Propane (LP) Fuel Supply Requirements (U.S.)

LP gas fuel tanks of 2000 gallons (water volume) [7 571 L] capacity or less must be installed with the nearest point at least 25' [7.62 m] from the nearest point of the Dryer. LP tanks with a combined volume of 2001 - 30,000 gallons [7 575 - 11 362 L] capacity must be installed with the nearest point at least 50' [15.24 m] or more from the nearest point of the Dryer. This is mandatory per NFPA Bulletin No. 58, Storage and Handling Liquefied Petroleum Gases.

IMPORTANT! LP piping must be Schedule 80 black iron pipe or stronger, connected to the supply line on LP-gas Dryers.

Each LP gas supply tank must have an excess flow valve that has a rated flow less than the flow capacity of the piping from the tank to the Dryer. The piping and excess flow valve design must be installed inside each LP tank and must meet the requirements of NFPA No. 58, Paragraph 3135 (a) (3) current edition in effect at the time of installation. Suggested excess flow valve capacity ratings are 3 - 6 gallons [11.4 - 22.7 L] per minute.

A manual gas shutoff valve must be installed as close to the LP tank as possible, must be at least 25' [7.62 m] away from the Dryer, and readily accessible. Each tank must have a separate shutoff valve. For manifolds connecting parallel tank installations, a main shutoff valve should be installed in the pipe just downstream of the manifold.

IMPORTANT! DO NOT OPERATE the Dryer while the LP tank is being filled—wait for ten minutes after the truck filler hose has been removed

LP gas fuel tank storage should be a minimum of:

1000 gallons [3 785 L] (in water volume) for models SQ8, 12 and 16;
2000 gallons [7 571 L] for SQ20 models;
3000 gallons [11 356 L] for models SQ24 through SQ40
To assure an adequate fuel supply for 24-hour operation, without daily fill-up:
two (2) 1000-gallon [3785-L]tanks in parallel should be used for models SQ12 through SQ16;
3000 gallons [11 356 L] for SQ20 models
5000 gallons [18 927 L] for SQ24 models
8000 gallons [30 283 L] for models SQ28 through SQ40.

An LP fuel tank contains a usable fuel supply of approximately 75% of tank water volume capacity. For example, a 1000-gallon [3 785-L]water-volume tank contains approximately 750 gallons