MB & MBV
Monoblock Graphite Disks

Graphite disks especially suited for low pressure applications.

• One-piece assembly and attached gaskets simplify installation and reduce down-time
• Available sizes range from 0.5 to 24 inches (15 mm to 600mm)
• Available temperatures range to 400 degrees Fahrenheit (205 degrees Celsius)

MonoBloc disks fit most applications where a graphite disk is needed.

When using a MonoBloc disk in application:

• Vacuum supports are needed for disks rated below 22 psig (1.52 bar) and where a vacuum condition exists (Model MBV™)
• Vacuum supports not needed for sizes 0.5", .75" (15 and 20 mm)
• Temperature ranges -100 degrees Fahrenheit to 400 degrees Fahrenheit (-73 degrees Celsius to 205 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 MB™ disks supplied with integral gaskets
• Available for installation between ANSI, DIN, AFNOR, BS and JIS pipe flanges & located inside the bolt circle

MB™ MonoBloc disks are available in sizes from 0.5" to 24" (15mm to 600mm) with a temperature range to 400ºF (205º C).

MB & MBV Specifications

Nominal Size		Burst Ratings				Internal Diameter		Disk Thickness
		Barg		PSIG
mm	in.	min.	max.	min.	max.	mm	in.	mm	in.
15	0.5	1.72	10.3	25	150	16.9	0.625	16	0.625
20	0.75	1.72	10.3	25	150	21.0	0.825	16	0.625
25	1	0.69	10.3	10	150	27.2	1.01	22	0.875
40	1.5	0.49	10.3	7	150	41.1	1.62	22	0.875
50	2	0.21	10.3	2	150	52.6	2.07	22	0.875
80	3	0.14	10.3	1	150	78.0	3.07	22	0.875
100	4	0.10	10.3	1	150	103.4	4.07	22	0.875
150	6	0.069	10.3	1	170	154.2	6.07	22	0.875
200	8	0.035	10.3	0.5	170	205.0	8.07	29	1.125
250	10	0.017	8.6	0.25	150	255.8	10.07	38	1.50
300	12	0.017	8.6	0.25	150	306.6	12.07	51	2.00
350	14	0.017	6.9	0.25	100	336.5	13.25	57	2.25
400	16	0.017	6.9	0.25	100	387.4	15.25	64	2.50
450	18	0.017	6.9	0.25	100	438.2	17.25	70	2.75
500	20	0.017	3.4	0.25	50	489.0	19.25	76	3.00
600	24	0.017	3.4	0.25	50	590.6	23.25	76	3.00

Type AMB and AMBV (armored versions of types MB & MBV) share the above dimensions.

Note: In the case of the MBV disk either a dial type or a bar type vacuum support is integrated into the disk. This will reduce the free vent area to provide the following proportion of the internal bone:

Size	1"	1½"	2"	3"	4"	6"	8"	10" and Larger
Dial Type	-	0.56	0.57	0.60	0.62	0.58	0.60	0.60
Bar Type	0.7	0.80	0.80	0.80	0.80	0.80	0.80	0.80

Bar type vacuum supports are recommended for set pressures between 10 psig (0.69 bar) and 22 psig (1.52 bar).

Dial type vacuum supports are recommended for set pressures up to 10 psig (0.69 bar).

Where back pressure resistance exceeding 1 atmosphere is required, bar and dial supports can be used. Please consult BS&B