4 New Honeywell L408J Vaporstat Controllers From DtiCorp.com

Online, March 3, 2011 (Newswire.com) - Popular Honeywell online retailer DtiCorp.com (http://www.DtiCorp.com) is introducing 7 brand new Honeywell VP531 Pneumatic Valves. The L408J VaporStat Controllers are line voltage pressure controllers that provide operating control or automatic limit protection for pressure systems of up to 4 psi (27.6 kPa). All models have Microswitch snap switches to open or close a circuit on a pressure rise.

When used with steam boilers, always mount the controller above the water line in the boiler. A steam trap (siphon loop) must always be connected between the controller and the boiler to prevent boiler scale and corrosive vapors from attacking the diaphragm.

The controller can be mounted (1) alongside the pressure gauge, (2) in a fitting on the boiler provided by the manufacturer, (3) at a remote location in case of excessive vibration, or (4) in a special mounting on a low water cutoff.

Make all pipe connections in accordance with approved standards. When making pipe connections, use pipe compound sparingly to seal the joints. Excess pipe compound may clog the small hole in the fitting and prevent the controller from operating properly. To avoid leaks and damage to the case, use a parallel jaw wrench on the controller hexagonal fitting. Do not tighten the controller by hand by holding the case.

To mount the controller alongside a pressure gauge, remove the gauge. In its place, install a steam trap (siphon loop) with a tee on top. Using elbows and pipe nipples, mount the controller and pressure gauge on the ends of the tee.

If it is not convenient to mount the controller alongside the pressure gauge, install a steam trap (siphon loop) in the fitting provided by the boiler manufacturer. Screw the controller directly on the steam trap.

If there is excessive vibration at the boiler which may adversely affect the operation of the controller, the controller should be mounted at a remote location. All piping from the boiler must be suitable and solidly mounted. The piping must be properly pitched to drain all condensation back to the boiler. A steam trap (siphon loop) must be mounted between the remote piping and the controller.

Features:

- Primarily for use in vapor heating systems, but also may be used with liquids, air, and other noncombustible gases.
- Stainless steel diaphragm also allows use with ammonia, oxygen, distilled water, and similar media.
- Maximum surge pressure of 15 psi (103.4 kPa).
- All models have an adjustable subtractive differential.
- Adjustments are made by screws on top of case.
- Scaleplates are marked in English (psi) and metric (kPa) units.
- Case has clear plastic cover so that pressure settings can be observed.
- Hexagonal fitting with 1/4-18 NPT internal threads for direct mounting to the 50024585-001 Brass or 14206 Steel Steam Trap (siphon loop).
- Can also be surface mounted by screws through holes (knockouts) in back of case.
- Ground screw terminal.

Specifications:

- Maximum Surge Pressure: 15 psi (103.4 kPa).
- Switch: Snap Microswitch in all models.
- Pressure Sensing Element: Stainless steel diaphragm.
- Maximum Ambient Temperature: 150°F (66°C).
- Minimum Ambient Temperature: -35°F (-37°C).
- Adjustment Means: Screws on top of controller case. Scales are marked in psi and kPa.
- Electrical Connections: Internal screw terminals; holes in side of case for 1/2 inch conduit.
- Mounting Means: Hexagonal fitting on diaphragm has 1/4-18 NPT internal threads for mounting on a pipe or steam trap (siphon loop). Also can be surface mounted by screws through two holes (knockouts) in back of case.
- When using the controller with a compressor, install a dampening device (such as a needle valve, header, or surge tank) to dampen pulsations that can damage the controller or reduce its life.

Julian Arhire
Manager DtiCorp.com
Phone: 954.298.2515
Fax: 954.206.0767
Web: http://www.DtiCorp.com

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