SPECBOOK - MODEL 9GEF MERCURY-FREE FLOAT SWITCHES

The liquid level of the _______ shall be sensed by ____ (Qty) direct acting float switches. The system supplier shall furnish, install, and wire the float switches as shown on the drawings. Each switch shall be supplied with a minimum cable length of _____ (TBD based on project requirements). A float switch shall be provided for each of the following level switch points:

(Specify each switch with basic function)

Wastewater Lift Station  (Pump down)                Booster Pump Station (Pump up)

            1. High Level Alarm                                           1. High Level

            2. Lag Pump Required                                      2. Common Pump Off

            3. Lead Pump Required                                      3. Lead Pump Required

            4. Common Pump Off                                            4. Lag Pump Required             

            5. Low Level Alarm                                           5. Low Level

Float switch(s) shall be designed to insure long life and reliable operation in both water and wastewater applications. Float switch body shall be constructed of Teflon coated 20 Ga. 316 stainless steel housing measuring not less than 5 ½” in diameter.  A long life, high reliability, potted SPST magnetic reed switch rated for not less than 100 VA at up to 250 Volts shall be mounted inside the float and connected to a multi-stranded, 2 conductor plus ground, 16 gauge, CPE jacketed cable. The cord shall have fine strand conductors (Not more than 34 Gauge) made especially for heavy flexing service. The cable connection point shall be potted in epoxy providing a strong bond to the float and reed switch forming a water/moisture tight connection.  A flexible Neoprene sleeve, not less than 1/8” thick, shall be provided over the CPE jacketed cable extending not less than 5” from the top of the mounting bracket extending down through the cable mounting bracket hinge point to the top of the float switch body, providing cable stress point relief and extended operational life. 

A 316 SS ring flanged cable mounting clamp assembly shall be supplied allowing pipe or cable mounting as specified below. The float cable-mounting bracket shall be flared on both sides providing hinge point stress relief to both sides of the cable. 

The float switch assembly shall provide a minimum of two pounds of buoyancy in solutions with a specific gravity of 1.0 (water) and shall have an operating temperature rating of –35 to +90 Deg. C.

The float switches shall be Model 9GEF Floats as manufactured by US Filter Control Systems.

MODEL 9G-EF MOUNTING METHODS  (Choose A or B below)

A.  MODEL 9GCL3 STAINLESS STEEL MOUNTING CLAMP

The float switches shall be mounted to a 1" pipe utilizing all stainless steel float switch mounting hardware and secured in place by US Filter Control Systems Model 9GCL3 stainless steel mounting clamps.

B.  MODEL CBM SUSPENSION MOUNTING KIT

The direct acting float switch liquid level sensors shall be mounted to a common stainless steel cable/weight suspension mounting kit.  The stainless steel cable shall be multi-stranded and have a minimum of 1/8" diameter.  A plastisol-coated, 20-pound cast-iron weight with a cast-in-place stainless steel eyelet (for connection to the stainless steel cable with two stainless steel clamps) shall provide drift free mounting.  The kit shall utilize stainless steel float switch cable clamp mounting hardware with two stainless steel screws per clamp to provide easy field adjustment of float switch operating elevations.  The stainless steel cable shall have a loop with two cable clamps at the upper end of the assembly for mounting to an eyelet installed by the contractor in the top slab of the wet well.  The kit shall be a US Filter Control Systems.