Garlock 3700 Blue-Gard®
Unique blend of aramid fibers, and EPDM binder that provides improved torque retention and drastically lowered emission levels in a wide range of services: water, Saturated steam*, mild chemicals.

 
Typical Physical Properties*
Color Light grey
Binder EPDM
Temperature
Maximum            700º F (+370º C)
 Minimum              -40º F (-40ºC)
    Continuous max. +400º F (205º C)
Pressure, max.1 )                      psig   1200 (83)
Pressure, max.1 (psig xº F) 1/32", 1/16" 350,000
                           (bar xº C) x ºC) (0.8mm, 1.6 mm) (12,000)
  1/8" 250,000
  (3.2 mm) (8,600)
Sealability (ASTM F37B)22    
ASTM Fuel A ml/hr 0.1
Nitrogen ml/hr 0.7
Gas Permeability
     (Din 3535 Part 4)333 cc/min. 0.04
Creep Relaxation (ASTM F38) % 25
Compressibility Range

     (ASTM F36)

 % 7-17
Recovery
     (ASTM F36) min % 40
Tensile Strength across grain
     (ASTM F152) psi (N/mm2)

2500 (17)
Fluid Resistance

 
     (ASTM #1 Oil at +300º F (150ºC)    
     Thickness increase range % 20-35
     Weight increase max %  
     (ASTM #903 Oil +300º F (+150ºC)
     Thickness increase range % 60-100
     Tensile loss max %  
     ASTM Fuel Oil A +70-85º F (+20-30ºC)    
     Thickness increase range % 10-40
     Weight increase max %  
     (ASTM Fuel Oil B +70-85º F (+20-30ºC) range %  
     Thickness increase range % 20-50
     Weight increase max %  
Density 1/16" (1.6 mm) thick lbs/ft 100 (1.60)

Notes:

1. Based on Ansi RF Flanges at Garlock preferred torque. When approaching maximum pressure or continuous operating temperature, or 50%of maximum PXT, consult Garlock Engineering 1-800-448-6688.

                                                          

2. ASTM F37B Sealability, milliliters/hour (1/32" thick)                                                            

ASTM Fuel A (isooctane)

Gasket load = 500 psi 3.5 N/mm2)

Internal pressure = 9.8 psig (0.7 bar)

Nitrogen: 

Gasket load = 3000 psi (20.7 N/mm2) 

Internal pressure = 30 psig (2 bar)

                                                                                                 

3. DIN 3535 Part 4 Gas Permeability, cc/min. (1/16" thick)

    Gasket load = 4640 psi (32 N/mm2)

    Internal pressure = 580 psig (40 bar)

 

4. Saturated steam service guidelines:

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For optimal performance, use thinner gaskets when possible

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Minimum assembly stress = 4,800 psi

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Preferred assembly stress = 6,000 psi - 10,000 psi

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Retorque the bolts/studs prior to pressurizing the assembly. Never retorque a pressurized assembly.

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If the service is superheated steam, contact Application Engineering at 800-448-6688

          

     * above 150 psig, contact Application Engineering

 

This is a general guide and should not be the sole means of selecting or rejecting this material.                                                                                                                                  

 

ASTM test results in accordance with ASTM F-104; properties based on 1/32" (0.8 mm sheet thickness)

 

* Values do not constitute specification limits

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