86 HR Mechanical Seals for Pumps Pusher Seals

(1)Features
Single seal
Balanced
Independent of direction of rotation
Multiple springs stationary
Seat rotating
Seat arranged directly behind the impeller
Spring protection sleeve
Variant with cylindrical spring and acc. EN 12756
(HRZ1) available
Variant as cartridge with/without guide sleeve for
application with/without quench (HR2, HR3)
Dual seal as cartridge unit (HRKS-D) available

(2)Advantages
•Especially for application in solids containing media
without external flush or internal product circulation. Solids
content 40 % (single seal) and 60 % (double seal)
• Operation under vacuum without seat locking possible
• Pumping screw for increased circulation available
• Springs are protected from product and leakage
• No damage of the shaft by dynamically loaded O-Ring
• Insensitive to shaft deflections due to stationary design

(3)Operating range (see note on page 1)
Shaft diameter: dN = 36 ... 270 mm (1.4" ... 10.63")
Pressure: p1* = 16 bar (230 PSI)
Temperature: t = -20 °C ... +160 °C (-4 °F ... +320 °F)
Sliding velocity: vg = 10 m/s (33 ft/s)
*) For operation under vacuum it is necessary to arrange for
quenching on the atmosphere side.

(4)Materials
Seal face: Silicon carbide (Q1), (Q2)
Seat: Silicon carbide (Q1), (Q2)

(5)Standards and approvals
• EN 12756 (HRZ1)

(6)Recommended applications
• Water and waste water technology
• Power plant technology
• Pulp and paper industry
• Oil and gas industry
• Mining industry
• Dirty, abrasive and solids containing media
• Sewage water pumps
• Dredger pumps
• Oil sand extraction
• Scrubbers in flue-gas desulphurization plants (FGD)

(7)Item             Part no. to DIN 24250             Description
1.1                472                                           Seal face
1.2                520                                           Sleeve
2                   412.1                                        O-Ring
3                   474                                           Thrust ring
4                   477                                           Spring
5                   475                                           Seat (G11)
6                   412.2                                        O-Ring
7                   412.3                                        O-Ring
8                   441                                           Housing

(8)Seat alternatives

(9)Product variants
HR2
Cartridge-type single seal with guide sleeve (Item no. 2) for use
with quench. Insert (Item no. 1) either metal or Silicon carbide.

HR3
Cartridge-type single seal. Insert (Item no. 1) either metal
or silicon carbide. Optional without maintenance rinsing.

HRKS-D
Double seal in cartridge design for operation in barrier or
buffer pressure mode (does not open if barrier pressure
fails and closes automatically in the event of pressure
reversal), available alternatively with a pumping screw for
a higher rate of circulation. Torque transmission e.g. by
shrink disk.

HRZ1
Single seal with cylindrical spring and type G76 seat.
For installation in covers with installation dimensions
according to EN 12756 B or U. Installation length l11
corresponds to max. l1k. Intermediate sizes on request.

Dimensions in mm

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.

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).