Mechanical Seal MA290 / MA291

Type in the H-Brinker HBA290 HBA291

MA290 MA291 Operating range

MA290:

Pressure: p = … 20 bar (290 PSI)
Temperature: t = -20 °C …160 °C (-4 °F … 320 °F) (oil), 0 °C … 60 °C (32 °F … 140 °F) (water)
Sliding velocity: vg = max. 20 m/s (66 ft/s) Viscosity: 0.5 Pa·s
Solids content: 0.3 %

MA291:

Pressure: p = … 16 bar (232 PSI)
Temperature: t = -20 °C …160 °C (-4 °F … 320 °F) (oil), 0 °C … 60 °C (32 °F … 140 °F) (water)
Sliding velocity: vg = max. 20 m/s (66 ft/s)
Viscosity: 3 Pa·s
Solids content: 10 %

Item	Description
1	Seal face
2, 5, 7	O-Ring
3	Spring
4	Seat
6	Drive collar
8	Set screw
9	Seal cover
10	Gasket
11	Assembly fixture
12	HSH cap screw

MA290 MA291 Seal Features (HBA290)

Cartridge
Balanced
Independent of direction of rotation
Stationary multiple springs
Springs and pin located on the atmospheric side

MA290 MA291 Seal Material

Seal face (MA290): High density carbon graphite
Seal face (MA291): Silicon carbide (Q1)
Seat (MA290/291): Silicon carbide (Q1)
Metal parts: CrNiMo steel (G)
Secondary seals: FKM (V)

MA290 MA291 Advantages

Extremely short length design –
the total length including the seal cover is less than 50 mm
Easy installing on the pumps without modifying the stuffing box
Excellent followability due to no influence from run-out, squareness or vibration of the shaft
Mounted outside the stuffing box for providing excellent air cooling performance
Un-wetted springs and knock pins for protecting from lockout by liquid

MA290 ma291 Seal Recommended applications

Petrochemical industry
Chemical industry
Pharmaceutical industry
Pulp and paper industry
Water and waste water technology
Food and beverage industry
Universally applicable
Centrifugal pumps
Eccentric screw pumps
Process pumps

Dimension Table

d	d₁ min.	d₁ max.	d₂	d₃	l₁	l₂	l₃	l₄
20	30	51	58	104	42	18	60	12
25	35	51	58	104	42	18	60	12
30	40	56	63	108	42	18	65	12
35	45	66	73	118	42	16	75	14
40	50	66	73	118	42	16	75	14
45	55	71	78	128	42	16	80	14
50	60	81	88	138	44	16	90	14
55	65	81	88	138	44	16	90	14
60	70	96	103	164	46	14	105	18
65	75	96	103	164	46	14	105	18
70	80	102	109	178	46	14	111	18
75	85	114	121	193	49	14	123	18
80	90	114	121	193	49	14	123	18
85	95	124	131	208	49	13	133	20
90	100	124	131	208	49	13	133	20
95	105	134	141	218	49	13	143	20
100	110	134	141	218	49	13	143	20

Mechanical Seal MA290 / MA291

Type in the H-Brinker HBA290 HBA291

MA290 MA291 Operating range

MA290 MA291 Seal Features (HBA290)

MA290 MA291 Seal Material

MA290 MA291 Advantages

MA290 ma291 Seal Recommended applications

Dimension Table

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Product Categories

d	d₁ min.	d₁ max.	d₂	d₃	l₁	l₂	l₃	l₄
20	30	51	58	104	42	18	60	12
25	35	51	58	104	42	18	60	12
30	40	56	63	108	42	18	65	12
35	45	66	73	118	42	16	75	14
40	50	66	73	118	42	16	75	14
45	55	71	78	128	42	16	80	14
50	60	81	88	138	44	16	90	14
55	65	81	88	138	44	16	90	14
60	70	96	103	164	46	14	105	18
65	75	96	103	164	46	14	105	18
70	80	102	109	178	46	14	111	18
75	85	114	121	193	49	14	123	18
80	90	114	121	193	49	14	123	18
85	95	124	131	208	49	13	133	20
90	100	124	131	208	49	13	133	20
95	105	134	141	218	49	13	143	20
100	110	134	141	218	49	13	143	20

d	d₁ min.	d₁ max.	d₂	d₃	l₁	l₂	l₃	l₄
20	30	51	58	104	42	18	60	12
25	35	51	58	104	42	18	60	12
30	40	56	63	108	42	18	65	12
35	45	66	73	118	42	16	75	14
40	50	66	73	118	42	16	75	14
45	55	71	78	128	42	16	80	14
50	60	81	88	138	44	16	90	14
55	65	81	88	138	44	16	90	14
60	70	96	103	164	46	14	105	18
65	75	96	103	164	46	14	105	18
70	80	102	109	178	46	14	111	18
75	85	114	121	193	49	14	123	18
80	90	114	121	193	49	14	123	18
85	95	124	131	208	49	13	133	20
90	100	124	131	208	49	13	133	20
95	105	134	141	218	49	13	143	20
100	110	134	141	218	49	13	143	20

Mechanical Seal MA290 / MA291

Type in the H-Brinker HBA290 HBA291

MA290 MA291 Operating range

MA290 MA291 Seal Features (HBA290)

MA290 MA291 Seal Material

MA290 MA291 Advantages

MA290 ma291 Seal Recommended applications

Dimension Table

Related products

Product Categories

d	d₁ min.	d₁ max.	d₂	d₃	l₁	l₂	l₃	l₄
20	30	51	58	104	42	18	60	12
25	35	51	58	104	42	18	60	12
30	40	56	63	108	42	18	65	12
35	45	66	73	118	42	16	75	14
40	50	66	73	118	42	16	75	14
45	55	71	78	128	42	16	80	14
50	60	81	88	138	44	16	90	14
55	65	81	88	138	44	16	90	14
60	70	96	103	164	46	14	105	18
65	75	96	103	164	46	14	105	18
70	80	102	109	178	46	14	111	18
75	85	114	121	193	49	14	123	18
80	90	114	121	193	49	14	123	18
85	95	124	131	208	49	13	133	20
90	100	124	131	208	49	13	133	20
95	105	134	141	218	49	13	143	20
100	110	134	141	218	49	13	143	20