Graco Inc.

MD2 Dispense Valve 

Accurately dispenses and mixes two-component sealants and adhesives

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PR70
  • Minimizes maintenance time and costs while maximizing dispense time
  • Designed with fewer parts and is easy to clean
  • Streamlines maintenance and service
  • Complete modular design adapts to different installation needs
  • No unique tools required

MD2 Valve
Maximum Fluid Pressure
255179-255182: 3000 psi
20.7 MPa, 207 bar
255183: 2000 psi
13.8 MPa, 138 bar
13.8 MPa, 138 bar
Maximum Cylinder Air Pressure
120 psi
0.84 MPa, 8.4 bar
Air Inlets (open (I) and close (O) ports)
1/8 npt(f)
1/8 npt(f)
Fluid Inlets
9/16 straight thread o-ring boss “A” and “B”
9/16 straight thread o-ring boss “A” and “B”
Fluid Outlet
7/8-9 bell outlet
7/8-9 bell outlet
Fluid Viscosity Range:
Soft Seats
1-1 million cps
1-1 million cps
Hard Seats
20-1 million cps
20-1 million cps
Fluid Section Sealing
Isolation chamber with zerk fittings and dual seals.
Isolation chamber with zerk fittings and dual seals.
Divorced Air Cylinder
Double acting, buna-n o-rings
Double acting, buna-n o-rings
Weight
255179 / 255180 (1:1 valves)
1.45 lb
0.66 kg
255181 / 255182 (10:1 valves)
1.50 lb
0.68 kg
255206 (pneumatic handle)
0.85 lb
0.39 kg
255208 (electric handle)
0.90 lb
0.41 kg
255249 (electric lever)
0.75 lb
0.34 kg)
Wetted Parts
Stainless Steel Valve
303 sst, 17-4 SS, UHMWPE, PEEK, Chemical Resistant o-rings. 440C SS and C2 carbide with cobalt binder (hard seat only)
303 sst, 17-4 SS, UHMWPE, PEEK, Chemical Resistant o-rings. 440C SS and C2 carbide with cobalt binder (hard seat only)