10 M7N Mechanical Seals for Pumps Pusher Seals

• Structure: Single End
• Pressure: High Pressure Mechanical Seals
• Speed: Ultra-High-Speed Mechanical Seal
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: 10 M7N
• Temperature: Temperature Mechanical Seal
• Performance: Corrosion
• Standard: Standard
• Type: Custom-Made, TS
• Balance: Balanced
• Payment Method: T/T, Western Union, L/C etc
• Replace: Bogmann Seals
• Export Port: Ningbo Port, Shanghai Port
• Products Packaging: White Box
• Min Order Qty: 5 Pcs
• Transport Package: Carton Packing
• Specification: Inch shaft size 0.625-4.000
• Trademark: Custom-made, TS
• Origin: Made in China
• HS Code: 8484200090
• Production Capacity: 1000000 PCS/Year
• Package Size: 38.00cm * 38.00cm * 32.00cm
• Package Gross Weight: 20.000kg

Product Description

N

Product Description

(1)Features
• For plain shafts
• Single seal
• Unbalanced
• Super-Sinus-spring or multiple springs rotating
• Independent of direction of rotation
• Pumping screw for media with higher viscosity (M7..F)
• Variant with PTFE secondary seals for high chemical 
resistance (M78N)

(2)Advantages
• Universal application opportunities
• Efficient stock keeping 
due to easily interchangeable faces
• Extended selection of materials
• Insensitive to low solids contents
• Flexibility in torque transmissions
• Self cleaning effect
• Short installation length possible (G16)

(3)Operating range (see note an page 1)
Shaft diameter: d1 = 14 ... 100 mm (0.55" ... 3.94")
Pressure: p1 = 25 bar (363 PSI)
Temperature: t = -50 °C ... +220 °C (-58 °F ... +428 °F)
Sliding velocity: vg = 20 m/s (66 ft/s)
Axial movement: 
d1 = ... 25 mm: ±1.0 mm
d1 = 28 ... 63 mm: ±1.5 mm
d1 = from 65 mm: ±2.0 mm

(4)Materials 
Seal face: Special cast CrMo steel (S), Silicon carbide 
(Q1, Q2), Aluminium Oxide (V)
Seat G9: Carbon graphite antimony impregnated (A), 
Carbon graphite resin impregnated (B), Silicon carbide 
(Q1*, Q2*) 
Seat G4: Silicon carbide (Q1*, Q2*) 
Seat G6: Silicon carbide (Q1*, Q2*) 
Seat G13: Carbon graphite antimony impregnated (A), 
Carbon graphite resin impregnated (B)
Secondary seals: EPDM (E), NBR (P), FKM (V), FFKM (K)
Springs: CrNiMo steel (G)
Metal parts: CrNiMo steel (G), Duplex (G1)
* Cannot be combined with seal face in S

(5)Standars and approvals
• EN 12756

(6)Torque transmissions
 

(7)Item     Part no.to DIN 24250        Description
1.1            472                                     Seal face
1.2            485                                     Drive collar
1.3            474                                     Thrust ring
1.4            412.1                                  O-Ring
1.5            477                                     Spring
1.6            904                                     Set screw
2               475                                     Seat (G9)
3               412.2                                  O-Ring

(8)Recommended applications
• Process industry
• Water and waste water industry
• Chemical industry
• Marine technology
• Food and beverage industry
• Lube oils
• Low solids content media
• Water / sewage water pumps
• Chemical standard pumps
• Vertical screw pumps
• Gear wheel feed pumps
• Multistage pumps (drive side)
• Circulation of printing colors with viscosity 
500 ... 15,000 mm2/s
 

(9)Product variants
M74
Dimensions, items and descriptions
as for M7N, but with multiple springs
(Item no. 1.5). Preferably for d1 > 100 mm (3.94")

M7F
Shaft diameter: d1 = max. 100 mm (3.94")
Dimensions, items and descriptions
as for type M7N, but with pumping screw. Dependent on 
direction of rotation! (Viscosity ≤ ISO VG10). 

M74F
Shaft diameter: d1 = 14 ... 200 mm (0.55" ... 7.87")
Dimensions, items and descriptions
as for type M7N, but with multiple springs and pumping 
screw. Dependent on direction of rotation!
(Viscosity ≤ ISO VG10) 

M7S2
Shaft diameter: d1 = max. 100 mm (3.94").
Dimensions, items and descriptions
as for type M7N, but with drive key.
(without item no. 1.6)

M74S2
Shaft diameter: d1 = 28 ... 200 mm (1.10" ... 7.87")
Dimensions, items and descriptions
as for type M7N, but with multiple springs and drive key.
(without item no. 1.6)

M78N
Shaft diameter: d1 = 18 ... 100 mm (0.71" ... 3.94")
Temperature: t = max. 180 °C (356 °F)
Dimensions, items and description as for M7N. Design 
of the seal face especially for secondary sealing element 
made of PTFE (T).
Seal face: Carbon graphite antimony impregnated (A), 
Carbon graphite resin impregnated (B), 
Silicon carbide (Q1)*
Seat G9: Special cast CrMo steel (S)*, 
Silicon carbide (Q1)
* Cannot be combined with seal face made of silicon carbide (Q1)

 

Detailed Photos

 

Product Parameters

 

d1	d3	d6	d7	d8	d11	d12	d24	ds	L1k	L3	L5	L6	L7	L8	L9	L10	L11	L12	L13	L14	L15	L16	L18	L19	L28	b	f	Mx	umax.	t	R
14*	25.0	21.0	25.0	3.0	20.5	24.6	16.0	34.0	35.0	25.0	1.5	4.0	8.5	17.5	10.0	7.5	10.0	6.5	7.6	5.6	1.2	3.8	-	-	6.6	4.0	6.0	M5	10.0	1.5	1.2
16*	27.0	23.0	27.0	3.0	22.0	28.0	18.0	36.0	35.0	25.0	1.5	4.0	8.5	17.5	10.0	7.5	11.5	8.5	9.0	7.5	1.2	3.8	-	-	6.6	4.0	6.0	M5	10.0	1.5	1.5
18*	33.0	27.0	33.0	3.0	24.0	30.0	20.0	38.0	37.5	26.0	2.0	5.0	9.0	19.5	11.5	8.5	12.5	9.0	10.0	8.0	1.5	5.0	15.0	7.0	7.5	5.0	7.0	M5	12.0	1.1	1.5
20*	35.0	29.0	35.0	3.0	29.5	35.0	22.0	40.0	37.5	26.0	2.0	5.0	9.0	19.5	11.5	8.5	12.5	8.5	9.5	7.5	1.5	5.0	15.0	7.0	7.5	5.0	7.0	M5	12.0	1.1	1.5
22*	37.0	31.0	37.0	3.0	29.5	35.0	24.0	42.0	37.5	26.0	2.0	5.0	9.0	19.5	11.5	8.5	12.5	8.5	9.5	7.5	1.5	5.0	15.0	7.0	7.5	6.0	7.0	M5	12.0	1.5	1.5
24*	39.0	33.0	39.0	3.0	32.0	38.0	26.0	44.0	40.0	28.5	2.0	5.0	9.0	19.5	11.5	8.5	12.5	8.5	9.5	7.5	1.5	5.0	15.0	7.0	7.5	6.0	8.0	M5	12.0	1.5	1.5
25*	40.0	34.0	40.0	3.0	32.0	38.0	27.0	45.0	40.0	28.5	2.0	5.0	9.0	19.5	11.5	8.5	12.5	8.5	9.5	7.5	1.5	5.0	15.0	7.0	7.5	6.0	8.0	M5	12.0	1.5	1.5
28*	43.0	37.0	43.0	3.0	36.0	42.0	30.0	47.0	42.5	31.0	2.0	5.0	9.0	19.5	11.5	8.5	14.0	10.0	11.0	9.0	1.5	5.0	15.0	7.0	7.5	6.0	8.0	M6	13.0	1.5	1.5
30*	45.0	39.0	45.0	3.0	39.2	45.0	32.0	49.0	42.5	31.0	2.0	5.0	9.0	19.5	11.5	8.5	14.0	11.5	11.0	10.5	1.5	5.0	15.0	7.0	7.5	6.0	8.0	M6	13.0	1.5	1.5
32*	47.0	42.0	48.0	3.0	42.2	48.0	34.0	51.0	42.5	31.0	2.0	5.0	9.0	19.5	11.5	8.5	14.0	11.5	11.0	10.5	1.5	5.0	15.0	7.0	7.5	6.0	8.0	M6	13.0	1.5	1.5
33*	48.0	42.0	48.0	3.0	44.2	50.0	35.0	51.0	42.5	31.0	2.0	5.0	9.0	19.5	11.5	8.5	14.5	12.0	11.5	10.5	1.5	5.0	15.0	7.0	7.5	6.0	8.0	M6	13.0	1.5	1.5
35*	50.0	44.0	50.0	3.0	46.2	52.0	37.0	54.0	42.5	31.0	2.0	5.0	9.0	19.5	11.5	8.5	14.5	12.0	11.5	11.0	1.5	5.0	15.0	7.0	7.5	6.0	8.0	M6	13.0	1.5	1.5
38*	55.0	49.0	56.0	4.0	49.2	55.0	40.0	59.0	45.0	31.0	2.0	6.0	9.0	22.0	14.0	10.0	14.5	11.3	11.5	10.3	1.5	5.0	16.0	8.0	9.0	6.0	8.0	M6	13.0	1.5	1.5
40*	57.0	51.0	58.0	4.0	52.2	58.0	42.0	61.0	45.0	31.0	2.0	6.0	9.0	22.0	14.0	10.0	14.5	11.8	11.5	10.8	1.5	5.0	16.0	8.0	9.0	6.0	8.0	M6	13.0	1.5	1.5
43*	60.0	54.0	61.0	4.0	53.3	62.0	45.0	65.0	45.0	31.0	2.0	6.0	9.0	22.0	14.0	10.0	17.0	13.2	14.3	12.0	2.0	6.0	16.0	8.0	9.0	6.0	8.0	M6	13.0	1.5	2.5
45*	62.0	56.0	63.0	4.0	55.3	64.0	47.0	66.0	45.0	31.0	2.0	6.0	9.0	22.0	14.0	10.0	17.0	12.8	14.3	11.6	2.0	6.0	16.0	8.0	9.0	6.0	8.0	M6	13.0	1.5	2.5
48*	65.0	59.0	66.0	4.0	59.7	68.4	50.0	69.0	45.0	31.0	2.0	6.0	9.0	22.0	14.0	10.0	17.0	12.8	14.3	11.6	2.0	6.0	16.0	8.0	9.0	6.0	8.0	M6	13.0	1.5	2.5
50*	67.0	62.0	70.0	4.0	60.8	69.3	52.0	71.0	47.5	32.5	2.5	6.0	9.0	23.0	15.0	10.5	17.0	12.8	14.3	11.6	2.0	6.0	17.0	9.5	9.5	6.0	8.0	M6	13.0	1.5	2.5
53*	70.0	65.0	73.0	4.0	63.8	72.3	55.0	75.0	47.5	32.5	2.5	6.0	9.0	23.0	15.0	12.0	17.0	13.5	14.3	12.3	2.0	6.0	17.0	9.5	11.0	6.0	8.0	M6	13.0	1.5	2.5
55*	72.0	67.0	75.0	4.0	66.5	75.4	57.0	76.0	47.5	32.5	2.5	6.0	9.0	23.0	15.0	12.0	18.0	14.5	15.3	13.3	2.0	6.0	17.0	9.5	11.0	6.0	8.0	M6	13.0	1.5	2.5
58*	79.0	70.0	78.0	4.0	69.5	78.4	60.0	83.0	52.5	37.5	2.5	6.0	9.0	23.0	15.0	12.0	18.0	14.5	15.3	13.3	2.0	6.0	18.0	10.5	11.0	8.0	9.0	M8	13.0	1.9	2.5
60*	81.0	72.0	80.0	4.0	71.5	80.4	62.0	85.0	52.5	37.5	2.5	6.0	9.0	23.0	15.0	12.0	18.0	14.5	15.3	13.3	2.0	6.0	18.0	10.5	11.0	8.0	9.0	M8	13.0	1.9	2.5
63*	84.0	75.0	83.0	4.0	74.5	83.4	65.0	88.0	52.5	37.5	2.5	6.0	9.0	23.0	15.0	12.0	18.0	14.2	15.3	13.3	2.0	6.0	18.0	10.5	11.0	8.0	9.0	M8	13.0	1.9	2.5
65*	86.0	77.0	85.0	4.0	76.5	85.4	67.0	95.0	52.5	37.5	2.5	6.0	9.0	23.0	15.0	12.0	18.0	14.2	15.3	13.0	2.0	6.0	18.0	10.5	11.0	8.0	9.0	M8	13.0	1.9	2.5
68*	89.0	81.0	90.0	4.0	82.7	91.5	70.0	93.0	52.5	34.5	2.5	7.0	9.0	26.0	18.0	12.5	19.0	14.9	16.0	13.7	2.0	6.0	18.5	11.0	11.3	8.0	9.0	M8	13.0	1.9	2.5
70*	91.0	83.0	92.0	4.0	83.0	92.0	72.0	95.0	60.0	42.0	2.5	7.0	9.0	26.0	18.0	12.5	18.0	14.2	15.3	13.0	2.0	6.0	19.0	11.5	11.3	8.0	9.0	M8	16.0	1.9	2.5
75*	99.0	88.0	97.0	4.0	90.2	99.0	77.0	105.0	60.0	42.0	2.5	7.0	9.0	26.0	18.0	12.5	18.0	15.2	15.3	14.0	2.0	6.0	19.0	11.5	11.3	8.0	10.0	M8	16.0	1.9	2.5
80*	104.0	95.0	105.0	4.0	95.2	104.0	82.0	109.0	60.0	41.8	3.0	7.0	9.0	26.2	18.2	13.0	19.0	16.2	16.3	15.0	2.0	6.0	19.0	11.5	12.0	8.0	10.0	M8	16.0	1.9	2.5
85*	109.0	100.0	110.0	4.0	100.2	109.0	87.0	114.0	60.0	41.8	3.0	7.0	9.0	26.2	18.2	15.0	19.0	16.0	16.3	14.8	2.0	6.0	19.0	11.5	14.0	8.0	10.0	M8	16.0	1.9	2.5
90*	114.0	105.0	115.0	4.0	105.2	114.0	92.0	119.0	65.0	46.8	3.0	7.0	9.0	26.2	18.2	15.0	19.0	16.0	16.3	14.8	2.0	6.0	20.5	13.0	14.0	10.0	10.0	M8	20.0	2.3	2.5
95*	119.0	110.0	120.0	4.0	111.6	120.3	97.0	124.0	65.0	47.8	3.0	7.0	9.0	25.2	17.2	15.0	20.0	17.0	17.3	15.8	2.0	6.0	20.5	13.0	14.0	10.0	10.0	M8	20.0	2.3	2.5
100*	124.0	115.0	125.0	4.0	114.5	123.3	102.0	129.0	65.0	47.8	3.0	7.0	9.0	25.2	17.2	15.0	20.0	17.0	17.3	15.8	2.0	6.0	20.5	13.0	14.0	10.0	10.0	M8	20.0	2.3	2.5
105.0	138.0	122.2	134.3	5.0	-	-	108.0	143.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
110.0	143.0	128.2	140.3	5.0	-	-	113.0	148.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
115.0	148.0	136.2	148.3	5.0	-	-	118.0	153.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
120.0	153.0	138.2	150.3	5.0	-	-	123.0	158.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
125.0	158.0	142.2	154.3	5.0	-	-	128.0	163.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
130.0	163.0	146.2	158.3	5.0	-	-	133.0	168.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
135.0	168.0	152.2	164.3	5.0	-	-	138.0	173.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
140.0	173.0	156.2	168.3	5.0	-	-	143.0	178.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
145.0	178.0	161.2	173.3	5.0	-	-	148.0	183.0	67.0	47.0	2.0	10.0	-	30.0	20.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
150.0	183.0	168.2	180.3	5.0	-	-	153.0	188.0	69.0	47.0	2.0	10.0	-	32.0	22.0	-	-	-	-	-	-	-	-	-	-	10.0	10.0	M8	20.0	2.3	-
155.0	191.0	173.2	185.3	5.0	-	-	158.0	196.0	80.0	56.0	2.0	12.0	-	34.0	24.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
160.0	196.0	178.2	190.3	5.0	-	-	163.0	201.0	80.0	56.0	2.0	12.0	-	34.0	24.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
165.0	201.0	183.2	195.3	5.0	-	-	168.0	206.0	80.0	56.0	2.0	12.0	-	34.0	24.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
170.0	206.0	188.2	200.3	5.0	-	-	173.0	211.0	80.0	56.0	2.0	12.0	-	34.0	24.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
175.0	211.0	193.2	205.3	5.0	-	-	178.0	216.0	80.0	56.0	2.0	12.0	-	34.0	24.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
180.0	216.0	207.5	219.3	5.0	-	-	183.0	221.0	84.0	56.0	2.0	12.0	-	38.0	28.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
185.0	221.0	212.5	224.3	5.0	-	-	188.0	226.0	84.0	56.0	2.0	12.0	-	38.0	28.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
190.0	226.0	217.5	229.3	5.0	-	-	193.0	231.0	84.0	56.0	2.0	12.0	-	38.0	28.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
195.0	231.0	222.5	234.3	5.0	-	-	198.0	236.0	84.0	56.0	2.0	12.0	-	38.0	28.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-
200.0	236.0	227.5	239.3	5.0	-	-	203.0	241.0	84.0	56.0	2.0	12.0	-	38.0	28.0	-	-	-	-	-	-	-	-	-	-	12.0	12.0	M8	24.0	2.1	-

1) Dimensions in mm.
2) According to EN 12756.
 * EN 12756    d1 >200 on request

Packaging & Shipping

Carton  packing ,size is 38x38x32.

Our Advantages

We have large stock, so our delivery  is very fast.
For example,if products are standarded, the delivery time is one week.
Our company and factory addrss: Ningbo City, Zhejiang  Province,China.
Our city has a large port and an airport, so its transportation is very convenient.

FAQ

Question1: What are the prices of your products?
Answer: For each model, the unit price is listed on the website, but what is displayed on the website is only the average market price. For specific models, you can contact us for further consultation and negotiation.

Question 2: Are you a factory or a trade company?
Answer: We are a factory with top sales for the trade service.
Question 3: What is the minimum order quantity for each order?
Answer: For products of regular models, the minimum order quantity is at least five. We welcome you to test the quality of our products and services through placing trial orders. Looking forward to the long-term cooperation with you.

Question4: What is your company's service tenet?
Answer: Quality first, service upmost. We promises that if there is any problem with the quality of the product, or if the product is damaged during the transportation, our company will be responsible for compensation, regardless of the ordder turnover value.

Question5: Can I try to get a SAMPLE before the order?
Answer:  Sure. Our company will provide you with samples for free, but you will have to pay for the international delivery (freight collect payment).