Application
The Centrifugal Sand Trap integrated with Worm Conveyor DF PSS is used for separation and discharge of sand and solid bodies from the wastewater treated with sand-water pulp drainage for the flotate discharge purposes. Multiple functions and small size makes this device an interesting alternative either for sewage or industrial treatment plants.

Functioning
The wastewater enter the cylindrical internal ring, the form of which makes the fluid circulate. The centrifugal force and weight makes the sand and solid bodies of high specific weight drop down to the conical collection chamber bottom, from where they are periodically transferred outside with the worm conveyor. The sand-water pulp is drained gravitationally during being transported. The wastewater with suspension are transferred outside the sand trap through the stub pipe assembled on the device shell. The fluid ring distribution system ensures high quality of sand separation process. The sand trap is equipped with fine-bubble aeration system, which prevents sedimentation of organic matter and sand, as well as supports fat floatation process. Flotate filtration is carried out through the adjusted flow process.

Equipment
- Cylindrical body connected with conical sedimentation segment.
- Internal separation ring.
- Fine-bubble wastewater aeration system [option].
- Automatic flotate and fat filtration system [option].
- Diagonal worm conveyor set under angle of 35-45o equipped with reverse motion mode.
- Power supply-control panel.
- Ex-version available [option].
- Winter package enabling outdoor installation of the device, system operated through signals from two autonomic thermostats (as an option).
- Material: stainless steel. Other materials may be used on demand.

Product features
- Sand removal: 90-98% for grains > 2,0mm.
- Fluid ring separation system.
- Less room required/small assembly space.
- Sand pulp organic compounds reduction.
- Flotate and fat filtration.

Parameter	Unit		PSS 1/60	PSS 2/120	PSS 3/150
Throughput	Q	m3/h	60	120	150
Grit separator diameter	D	mm	1300	1800	2300
Total height*	Hc	mm	2800	3540	3960
Influent height	h1	mm	1760	2490	2750
Effluent height	h2	mm	1710	2440	2700
Grit discharge height	h3	mm	1970	2755	3170
Total lenght*	L	mm	3470	4450	5050
Influent connection diameter	d1	mm	150	250	300
Effluent connection diameter	d2	mm	150	300	350
Flotation sludge discharge diameter	d3	mm	50	60	80
Screw conveyor driving motor power	P	kW	1,5	1,5	1,5
Compressed air demand	Zp	Nl/min	100	130	150
Volume	V	m3	0,9	2,5	4,3
Weight of sand trap	m	kg	500	1400	1850

* for screw conveyor inclination 45°