Black Max Boiler Handhole & Manhole Gaskets In Stock

Description:

 Black-Max® Handhole & Manhole Gaskets

Compared to spiral wound gaskets, Black-Max® seals better with our Exfoliated Graphite and has much better recovery properties. It also weighs less than half of that of spiral gaskets, so they are easier to handle and you will save on freight charges. And while spiral gaskets require near-perfect conditions, Black-Max® gaskets seal on rough, pitted surfaces under less compressive load.

BLACK-MAX® GASKETS

  • Temp: -400°F (-240°C) to +850°F (+454°C) in atmosphere, +1200°F (+650°C) in Steam
  • Pressure: 2000 psig (70 bar) | P x T 175,000 (6,000) 1/4"
  • M Factor 2 (Smooth Flange Surface) | Y Stress 900 psi (6 MPa) (Smooth Flange Surface)
  • Maximum Gasket Load 24,000 psi (165 MPa)
  • Gaskets are 1/4" Nominal Thickness

 

Ideal Applications for Black-Max®

Steam pressure Vessels  -  Liquid Treatment Vessels

Hot Water Heaters  -  Compressed air Tanks 

De-mineralizers  -  Dryer cans in paper mills

Steam humidifers  -  Water towers 

Water purifiers  -  Water softeners

Make-up tanks  - De-aerators

Item Name: Black Max Gaskets
Description:

Zero Leakage Under Pressure - Tests by major boiler manufacturers confirm that Black-Max® gaskets seal- with zero leakage-on steam to 450 psi and on cold-water hydro tests up to 1500 psi and Black-Max® withstands working temperatures up to 500 deg Fahrenheit. Rubber gaskets can't withstand that kind of pressure and heat.

 Field tests by major end-users confirm that Black-Max® gaskets seal with zero leakage in steam and in cold-water hydro tests. Black-Max® withstands working steam temperatures up to 1,200°F. Rubber gaskets can’t withstand that kind of pressure and heat. Easy Removal. Removal is easy and requires no scraping, chiseling or grinding - resulting in lower maintenance costs and less downtime.
Clearly Marked Sizes. Each gasket’s size is permanently marked, so you’ll know immediately that you have the one you need. Maximum Sealing on Rough Surfaces. The proprietary graphite used to manufacture Black-Max® is chemically inert (pH 0 -14) and resistant to chemicals used in treating boiler water.

 

Lead Time: Most Sizes & Quantities IN STOCK
Black Max Handhole Gaskets (Sold in 6-Packs)
A B C Weight (6 Pack)
Price
Elliptical or Obround Qty  
3-1/2" 4-1/2" 3/8" Flange 5.00 $34.95 Add to Cart
2-3/4" 3-1/2" 1/2" Flange 5.00 $34.95 Add to Cart
3" 3-3/4" 1/2" Flange 5.00 $34.95 Add to Cart
2-3/4" 3-3/4" 1/2" Flange 5.00 $34.95 Add to Cart
3" 4" 1/2" Flange 5.00 $34.95 Add to Cart
3" 4-1/2" 1/2" Flange 5.00 $34.95 Add to Cart
3-1/4" 5" 1/2" Flange 5.00 $34.95 Add to Cart
3-1/4" 4-1/2" 1/2" Flange 5.00 $34.95 Add to Cart
3-1/2" 4-1/2" 1/2" Flange 5.00 $34.95 Add to Cart
4" 6" 1/2" Flange 5.00 $36.95 Add to Cart
6" 8" 1/2" Flange 5.00 $68.95 Add to Cart
2-3/4" 3-1/2" 5/8" Flange 5.00 $34.95 Add to Cart
2-3/4" 3-3/4" 5/8" Flange 5.00 $34.95 Add to Cart
3" 3-3/4" 5/8" Flange 5.00 $34.95 Add to Cart
3" 4" 5/8" Flange 5.00 $34.95 Add to Cart
3" 4-1/2" 5/8" Flange 5.00 $34.95 Add to Cart
3-1/4" 4-1/2" 5/8" Flange 5.00 $34.95 Add to Cart
3-1/4" 5" 5/8" Flange 5.00 $36.95 Add to Cart
3-1/2" 4-1/2" 5/8" Flange 5.00 $36.95 Add to Cart
4" 5" 5/8" Flange 5.00 $36.95 Add to Cart
4" 6" 5/8" Flange 5.00 $37.95 Add to Cart
6" 8" 5/8" Flange 5.00 $73.95 Add to Cart
3" 4" 9/16" Flange 5.00 $34.95 Add to Cart
3-1/4" 4-1/2" 9/16" Flange 5.00 $36.95 Add to Cart
3-1/4" 5" 9/16" Flange 5.00 $39.95 Add to Cart
3-1/2" 4-1/2" 9/16" Flange 5.00 $37.95 Add to Cart
3" 4" 3/4" Flange 5.00 $34.95 Add to Cart
3" 4-1/2" 3/4" Flange 5.00 $34.95 Add to Cart
3" 5" 3/4" Flange 5.00 $34.95 Add to Cart
3-1/4" 4-1/2" 3/4" Flange 5.00 $35.95 Add to Cart
3-1/4" 5" 3/4" Flange 5.00 $37.95 Add to Cart
3-1/2" 4-1/2" 3/4" Flange 5.00 $36.95 Add to Cart
4" 5" 3/4" Flange 5.00 $38.95 Add to Cart
4" 6" 3/4" Flange 5.00 $42.95 Add to Cart
6" 8" 3/4" Flange 5.00 $78.95 Add to Cart
4" 6" 1" Flange 5.00 $47.95 Add to Cart
6" 8" 1" Flange 5.00 $88.95 Add to Cart
Black Max Manhole Gaskets (Sold Individually)
A B C Weight Individual Price Elliptical or Obround Qty  
8" 10" 3/4" Flange 5.00 $34.95 Add to Cart
10" 14" 3/4" Flange 5.00 $46.95 Add to Cart
10" 15" 3/4" Flange 5.00 $48.95 Add to Cart
11" 14" 3/4" Flange 5.00 $48.95 Add to Cart
11" 15" 3/4" Flange 5.00 $54.95 Add to Cart
11" 16" 3/4" Flange 5.00 $54.95 Add to Cart
12" 15" 3/4" Flange 5.00 $53.95 Add to Cart
12" 16" 3/4" Flange 5.00 $59.95 Add to Cart
14" 18" 3/4" Flange 5.00 $74.95 Add to Cart
18" 24" 3/4" Flange 5.00 $124.95 Add to Cart
8" 10" 1" Flange 5.00 $39.95 Add to Cart
10" 14" 1" Flange 5.00 $49.95 Add to Cart
10" 15" 1" Flange 5.00 $52.95 Add to Cart
11" 14" 1" Flange 5.00 $51.95 Add to Cart
11" 15" 1" Flange 5.00 $56.95 Add to Cart
11" 16" 1" Flange 5.00 $53.95 Add to Cart
12" 15" 1" Flange 5.00 $56.95 Add to Cart
12" 16" 1" Flange 5.00 $63.95 Add to Cart
14" 18" 1" Flange 5.00 $79.95 Add to Cart
16" 18" 1" Flange 5.00 $89.95 Add to Cart
18" 24" 1" Flange 5.00 $129.95 Add to Cart
8" 10" 1-1/4" Flange 5.00 $38.95 Add to Cart
10" 14" 1-1/4" Flange 5.00 $56.95 Add to Cart
10" 15" 1-1/4" Flange 5.00 $56.95 Add to Cart
11" 14" 1-1/4" Flange 5.00 $53.95 Add to Cart
11" 15" 1-1/4" Flange 5.00 $59.95 Add to Cart
11" 16" 1-1/4" Flange 5.00 $56.95 Add to Cart
12" 15" 1-1/4" Flange 5.00 $59.95 Add to Cart
12" 16" 1-1/4" Flange 5.00 $66.95 Add to Cart
14" 18" 1-1/4" Flange 5.00 $83.95 Add to Cart
16" 18" 1-1/4" Flange 5.00 $94.95 Add to Cart
18" 24" 1-1/4" Flange 5.00 $135.95 Add to Cart
12" 16" 1-1/2" Flange 5.00 $74.95 Add to Cart
14" 18" 1-1/2" Flange 5.00 $88.95 Add to Cart
18" 24" 1-1/2" Flange 5.00 $142.95 Add to Cart