Contra-flex 2 to 100 Litre Heating Expansion Vessel

For sealed heating installations (acc. to EN12828) and chilled water (cooling) installations.

• Nitrogen gas filling for longer maintenance of pre-pressure.
• Each vessel is factory tested.
• Diaphragm: Flexible rubber with rolling action.

Technical Specifications

• Maximum working pressure: 3.0 or 6.0 bar.
• Suitable for the addition of glycol-based anti-freeze up to 50%.
• Vessels by EN13831.
• Suitable for systems with a maximum system temperature of 110 °C.
• Minimum/Min./ max. temperature diaphragm: -10 / 70 °C.
• By Pressure Equipment Directive 2014/68/EU.
• Deep-drawn steel vessel halves with zinc-plated steel clench ring.
• Red (RAL 3002) or white (RAL 9010) epoxy powder coating.
• Diaphragm: SBR.
• Contraflex 35 - 80: With feet.

	Type	Capacity [l]	Pre- charge [bar]	Max. working pressure [bar]	Dimensions				Syst. conn. (E)	Weight [kg]		Order Code
					A [mm]	B [mm]	Ø C [mm]	D [mm]
	Contraflex  2 - 0.5 bar	2	0.5	3.0	216	144	-	-	G 3⁄4" M	1.5	120	13211
	Contraflex  2 - 1.5 bar	2	1.5	3.0	216	144	-	-	G 3⁄4" M	1.5	120	13213
	Contraflex  4 - 0.5 bar	4	0.5	3.0	216	192	-	-	G 3⁄4" M	1.8	90	13411
	Contraflex  8 - 0.5 bar	8	0.5	3.0	245	277	-	-	R 3⁄4"	2.2	50	26074
	Contraflex  8 - 1.5 bar	8	1.5	3.0	245	277	-	-	R 3⁄4"	2.2	50	26073
	Contraflex  8 white - 1.5 bar	8	1.5	3.0	245	277	-	-	R 3⁄4"	2.2	50	26063
	Contraflex 12 - 0.5 bar	12	0.5	3.0	286	258	-	-	R 3⁄4"	2.3	36	26136
	Contraflex 12 - 1.5 bar	12	1.5	3.0	286	258	-	-	R 3⁄4"	2.3	36	26133
	Contraflex 12 white - 1.5 bar	12	1.5	3.0	286	258	-	-	R 3⁄4"	2.3	36	26153
	Contraflex 18 - 0.5 bar	18	0.5	3.0	286	366	-	-	R 3⁄4"	2.9	24	26171
	Contraflex 18 - 1.0 bar	18	1.0	3.0	286	366	-	-	R 3⁄4"	2.9	24	26172
	Contraflex 18 - 1.5 bar	18	1.5	3.0	286	366	-	-	R 3⁄4"	2.9	24	26173
	Contraflex 18 white - 1.0 bar	18	1.0	3.0	286	366	-	-	R 3⁄4"	2.9	24	26162
	Contraflex 18 white - 1.5 bar	18	1.5	3.0	286	366	-	-	R 3⁄4"	2.9	24	26163
	Contraflex 25 - 0.5 bar	25	0.5	3.0	328	387	-	-	R 3⁄4"	3.5	18	26241
	Contraflex 25 - 1.5 bar	25	1.5	3.0	328	387	-	-	R 3⁄4"	3.5	18	26243
	Contraflex 25 white - 1.5 bar	25	1.5	3.0	328	387	-	-	R 3⁄4"	3.5	18	26233
	Contraflex 35 - 0.5 bar	35	0.5	3.0	396	435	263	118	R 3⁄4"	5.6	18	26341
	Contraflex 35 - 1.5 bar	35	1.5	3.0	396	435	263	118	R 3⁄4"	5.6	18	26343
	Contraflex 35 white - 1.5 bar	35	1.5	3.0	396	435	263	118	R 3⁄4"	5.6	18	26333
	Contraflex 50 - 0.5 bar	50	0.5	6.0	437	493	263	134	R 3⁄4"	11.4	12	26491
	Contraflex 50 - 1.5 bar	50	1.5	6.0	437	493	263	134	R 3⁄4"	11.4	12	26493
	Contraflex 50 white - 1.5 bar	50	1.5	6.0	437	493	263	134	R 3⁄4"	11.4	12	26483
	Contraflex 80 - 0.5 bar	80	0.5	6.0	519	534	360	140	R 1"	15.0	12	26791
	Contraflex 80 - 1.5 bar	80	1.5	6.0	519	534	360	140	R 1"	15.0	12	26793
	Contraflex 80 white - 1.5 bar	80	1.5	6.0	519	534	360	140	R 1"	15.0	12	26783