IMB
Monoblock Graphite Disks

Inverted MonoBloc disks are available to fit ANSI Class 150, Class 300 and Class 600 flanges for use in intermediate burst pressure applications up to 1000 psi.

When using an inverted MonoBloc disk in application:

• If a vacuum support is required, Model MBV™ disks must be specified
• Temperature ranges -100 degrees Fahrenheit to +400 degrees Fahrenheit (-73 degrees Celsius to 200 degrees Celsius)
• Armoring is recommended for all graphite disks for added safety, easier installation and elimination of breakage during installation
• Armor reduces the possibility of a premature burst due to uneven or excessive torqueing of the flange studs
• All IMB™ disks supplied with integral gaskets
• Available for installation between ANSI, DIN, AFNOR, BS and JIS pipe flanges & located inside the bolt circle

Inverted MonoBloc disks are supplied for ANSI Class 150, Class 300 and Class 600 flanges and in higher burst pressures than Model MB™ disks.

IMB Specifications

Nominal Size		Burst Ratings				Internal Diameter		Disk Thickness
		Barg		PSIG
mm	in.	min.	max.	min.	max.	mm	in.	mm	in.
1.5	0.5	1.72	17.2	25	250	15.9	0.625	16	0.625
20	0.75	1.72	17.2	25	250	21.0	0.825	16	0.625
25	1	0.69	17.2	10	250	27.2	1.07	22	0.875
40	1.5	0.49	17.2	7	250	41.1	1.62	22	0.875
50	2	0.21	17.2	3	250	52.6	2.07	22	0.875
80	3	0.14	17.2	2	250	78.0	3.07	22	0.875
100	4	0.10	17.2	1.5	250	103.4	4.07	22	0.875
150	6	0.069	11.7	0.5	170	154.2	6.07	22	0.875
200	8	0.035	11.7	0.5	170	205.0	8.07	29	1.125
250	10	0.017	10.3	0.25	150	255.8	10.07	38	1.50
300	12	0.017	10.3	0.25	150	306.6	12.07	51	2.00
325	14	0.017	10.3	0.25	150	336.5	13.25	57	2.25
400	16	0.017	10.3	0.25	150	387.4	15.25	64	2.50
450	18	0.017	10.3	0.25	150	438.2	17.25	70	2.75
500	20	0.017	10.3	0.25	150	489.0	19.25	76	3.00
600	24	0.017	10.3	0.25	150	590.6	23.25	76	3.00
15	0.5	1.72	69	25	1000	15.9	0.625	16	0.625
20	0.75	1.72	69	25	1000	21.0	0.825	16	0.625
25	1	0.69	69	10	1000	27.2	1.07	25	1.00
40	1.5	0.49	69	7	1000	41.1	1.62	25	1.00
50	2	0.21	34.5	3	500	52.6	2.07	25	1.00
80	3	0.14	34.5	2	500	78.0	3.07	32	1.25
100	4	0.10	34.5	1.5	500	103.4	4.07	32	1.25
150	6	0.069	31	1	450	154.2	6.07	44	1.75
200	8	0.035	31	0.5	450	205.0	8.07	57	2.25