Assimilation Traps

A Rechargeable In-Line Trap to Help Prevent Backstreaming

Part No. AT300-NW40

Offset with bottom connector for Alcatel Vacuum Pumps Part No. AT300-NW25-OFF

The Assimilation Traps are similar to our Coaxial Foreline Traps in that they are used between the rough vacuum pump and the diffusion (or turbo) pump to prevent backstreaming of oil into the diffusion pump. In addition, these traps prevent particulate matter from entering the vacuum pump.

Assimilation Traps have the added feature of a replaceable filtering element This allows easy replacement once it becomes contaminated, clogged, or corroded. A variety of different filtering mediums are available for specific applications described below. The quick clamp seal incorporates a Viton® gasket to provide a good vacuum seal. In addition to the elements listed, the user could incorporate his own medium into the assimilation trap for special applications. For example, if a lot of acidic compounds were to be pumped by the vacuum pump, NaOH or other basic compounds could be used in the trap to neutralize acids, and aluminum oxide filtering material could be used for high efficiency filtering. For applications such as lyophilizing (freeze drying), water trapping media such as Drierite® could be used. Activated carbon could also be used to trap organic molecules and keep them from contaminating the vacuum pump oil.

Assimilation Trap Elements

The standard element is coarse OFHC (oxygen free hard copper). Optional filtering elements are available as described below.

Coarse grade OFHC copper elements are standard. They provide a large surface area for condensing oil vapors. The pure copper surface attracts hydrocarbons due to its high affinity for that type of compound.

Coarse grade stainless steel is for applications where a copper element is not desirable due to the reactivity of copper with certain chemicals.

Trapping elements should be replaced every 6 months.

Assimilation Trap, UOM=EA
Part No.	Body Dimensions (WxL) (in x in)	Top Tubulation	Bottom Tubulation	Replacement Element	Capacity (cfm)	ship wt.	Quantity In Stock	Price	Quantity to order
AT25050	2 1/2 x 3 7/16	1/2in OD tube	1/2in OD tube	RE-250	5	5	0(#)	$248.00
AT25075	2 1/2 x 3 7/16	3/4in OD tube	3/4in OD tube	RE-250	11	5	PART NUMBER OUTDATED. New number is SAT75A(#)	---	---
AT300100	3 x 4 7/16	1in OD tube	1in OD tube	RE-300	17	5	PART NUMBER OUTDATED. New number is SAT100A(#)	---	---
AT300150	3 x 4 7/16	1 1/2in OD tube	1 1/2in tube	RE-300	17	5	PART NUMBER OUTDATED. New number is SAT150A(#)	---	---
AT250NW1675	2 1/2 x 3 7/16	NW16 Flange	3/4in OD tube	RE-250	11	5	0(#)	$263.00
AT250NW16	2 1/2 x 3 7/16	NW16 Flange	NW16 Flange	RE-250	11	5	PART NUMBER OUTDATED. New number is SAT16A(#)	---	---
AT300NW25100	3 x 4 7/16	NW25 Flange	1in OD tube	RE-300	17	5	0(#)	$314.00
AT300NW25	3 x 4 7/16	NW25 Flange	NW25 Flange	RE-300	17	5	PART NUMBER OUTDATED. New number is SAT25A(#)	---	---
AT300NW40150	3 x 4 7/16	NW40 Flange	1 1/2in OD tube	RE-300	17	5	0(#)	$325.00
AT300NW40	3 x 4 7/16	NW40 Flange	NW40 Flange	RE-300	17	5	PART NUMBER OUTDATED. New number is SAT40A(#)	---	---
AT300NW25OFF	3 x 4 7/16	NW25 Flange Offset	NW25 Flange Offset	RE-300	17	5	0(#)	$425.00
(#) Standard lead-time for out-of-stock items is approximately two weeks.
Ordering information. International (non-US) prices available through your local dealer.

Replacement Elements

UOM=EA
Part No.	Description	ship wt.	Quantity In Stock	Price	Quantity to order
RE250CC	Coarse Mesh OFHC-250 series	1	1	$35.00
RE300CC	Coarse Mesh OFHC-300 series	1	1	$45.00
RE250CS	Coarse Mesh Stainless-250 series	1	0(#)	$30.00
RE300CS	Coarse Mesh Stainless-300 series	1	5	$39.00
(#) Standard lead-time for out-of-stock items is approximately two weeks.
Ordering information. International (non-US) prices available through your local dealer.

Replacement Parts

UOM=EA
Part No.	Description	ship wt.	Quantity In Stock	Price	Quantity to order
G250	Replacement Gasket-250 series	1	0(#)	$10.00
G300	Replacement Gasket-300 series	1	0(#)	$10.50
SS250	Filter Screen-250 series	0.25	0(#)	$45.00
SS300	Filter Screen-300 series	0.25	0(#)	$50.00
(#) Standard lead-time for out-of-stock items is approximately two weeks.
Ordering information. International (non-US) prices available through your local dealer.

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ADDRESS: Scientific Instrument Services, 1027 Old York Rd., Ringoes, NJ 08551.