Description 
The Series MVA Pneumatically Actuated High Pressure Gas Control 
Valve is optimized for the demanding requirements of Automated Gas 
Cylinder Fill Plants, Manifold, and Piping System applications.  The High 
Pressure Oxygen Service Valve Configuration (Seal Option C) was third 
party tested per ISO 7291 (O2 Surge) and ASTM G175 (Promoted 
Ignition).  The valve is also available with a PCTFE seal (Seal Option K) 
for positive sealing in non-oxygen applications.   Series MVA valves can 
be specified Normally Open (-NO) or Normally Closed   (-NC) and are 
available in a variety of porting configurations.  Normally closed version 
seals bubble-tight up to an inlet pressure of 5500 PSI with only 85 PSI 
required to open valve to full orifice.    
Features 
 OXYGEN SAFE: Copper Valve (Seal Option C) Configuration Third 
Party Tested per ISO 7291 (O2 Surge) and ASTM G175 (Promoted 
Ignition) 
 LOW ACTUATION PRESSURE: 85 PSI Required to Actuate Valve 
 FLOW CONTROL: Unique Valve Geometry Allows User to Meter 
Flow on Initial Opening and Minimizes Initial Pressure Surges 
 LONG SERVICE LIFE: Extensive Life Cycle Testing Performed to 
Ensure Reliable Performance 
 HIGH FLOW: Large Orifices and Internal Flow Paths for Maximum 
Flow Efficiency 
 FIELD RE-BUILDABLE: All Seat / Seal Configurations Fully Field 
Re-Buildable 
 
Technical Data 
 Valve Operating Pressure: Vacuum to 5500 Psig (380 Bar) @ 70°F 
(MAWP Rating per ASME BPVC Section VIII Division 1) 
                    Note: Valves with NPSM Connections (1” - 11.5 NPSM) are de-rated to 
                    3500 Psig (242 bar) due to the connection’s maximum pressure rating.          
 Cylinder Operating Pressure: 85-125 PSIG 
 Operating Temperature Range: -40° to 165°F (-40° to 74°C) 
 Flow Coefficient: Cv is 2.5 for all valve configurations 
 Valves are 100% Factory Tested for Internal and External Leakage 
                No bubbles visible for 10 seconds with N2 gas at 2500 PSI. 
 
  Materials of Construction  
Component Material 
Copper Seat PCTFE Seat 
Body CW617N Forged Brass, EN 12420 
Bonnet, Poppet, Panel  
Nut, Inner Bonnet, Washer Brass, ASTM B16 
Valve Adapter (Non-Wetted) 303 SS, ASTM A582 
Stem Seal FKM Molythane 
Poppet Insert (Seal) Copper,  
ASTM B152  
PCTFE, 
ASTM D1430 
Replaceable Seat and Stem Monel® 400 303 SS 
O’Rings (2) FKM 
Replaceab 
 
 
Description 
The Series MVA Pneumatically Actuated High Pressure Gas Control 
Valve is optimized for the demanding requirements of Automated Gas 
Cylinder Fill Plants, Manifold, and Piping System applications.  The High 
Pressure Oxygen Service Valve Configuration (Seal Option C) was third 
party tested per ISO 7291 (O2 Surge) and ASTM G175 (Promoted 
Ignition).  The valve is also available with a PCTFE seal (Seal Option K) 
for positive sealing in non-oxygen applications.   Series MVA valves can 
be specified Normally Open (-NO) or Normally Closed   (-NC) and are 
available in a variety of porting configurations.  Normally closed version 
seals bubble-tight up to an inlet pressure of 5500 PSI with only 85 PSI 
required to open valve to full orifice.    
Features 
 OXYGEN SAFE: Copper Valve (Seal Option C) Configuration Third 
Party Tested per ISO 7291 (O2 Surge) and ASTM G175 (Promoted 
Ignition) 
 LOW ACTUATION PRESSURE: 85 PSI Required to Actuate Valve 
 FLOW CONTROL: Unique Valve Geometry Allows User to Meter 
Flow on Initial Opening and Minimizes Initial Pressure Surges 
 LONG SERVICE LIFE: Extensive Life Cycle Testing Performed to 
Ensure Reliable Performance 
 HIGH FLOW: Large Orifices and Internal Flow Paths for Maximum 
Flow Efficiency 
 FIELD RE-BUILDABLE: All Seat / Seal Configurations Fully Field 
Re-Buildable 
 
Technical Data 
 Valve Operating Pressure: Vacuum to 5500 Psig (380 Bar) @ 70°F 
(MAWP Rating per ASME BPVC Section VIII Division 1) 
                    Note: Valves with NPSM Connections (1” - 11.5 NPSM) are de-rated to 
                    3500 Psig (242 bar) due to the connection’s maximum pressure rating.          
 Cylinder Operating Pressure: 85-125 PSIG 
 Operating Temperature Range: -40° to 165°F (-40° to 74°C) 
 Flow Coefficient: Cv is 2.5 for all valve configurations 
 Valves are 100% Factory Tested for Internal and External Leakage 
                No bubbles visible for 10 seconds with N2 gas at 2500 PSI. 
 
  Materials of Construction  
Component Material 
Copper Seat PCTFE Seat 
Body CW617N Forged Brass, EN 12420 
Bonnet, Poppet, Panel  
Nut, Inner Bonnet, Washer Brass, ASTM B16 
Valve Adapter (Non-Wetted) 303 SS, ASTM A582 
Stem Seal FKM Molythane 
Poppet Insert (Seal) Copper,  
ASTM B152  
PCTFE, 
ASTM D1430 
Replaceable Seat and Stem Monel® 400 303 SS 
O’Rings (2) FKM 
Replaceable Seat Crush Washer Copper, ASTM B152 
Seal Washer, Backup Rings (2) PTFE, ASTM D1710 
Mounting Bracket A500 Structural Steel, Zinc Plated 
Valve Actuator Anodized Aluminum, Stainless 
Steel,  Nitrile Seals 
Mounting Nuts and Washers Zinc Plated Steelle Seat Crush Washer Copper, ASTM B152 
Seal Washer, Backup Rings (2) PTFE, ASTM D1710 
Mounting Bracket A500 Structural Steel, Zinc Plated 
Valve Actuator Anodized Aluminum, Stainless 
Steel,  Nitrile Seals 
Mounting Nuts and Washers Zinc Plated Steel