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56<br />
Typical Materials of Construction<br />
Dynamic Balance <strong>Valves</strong><br />
Size 4 and Smaller <strong>Valves</strong><br />
Part Name<br />
ASME and API 6D <strong>Valves</strong> API 6A <strong>Valves</strong><br />
Category A Category B Category C Category D Category C OS (4)<br />
Adjusting Screw Alloy <strong>Steel</strong><br />
Adjusting Screw Cap Carbon <strong>Steel</strong><br />
Ball Stainless <strong>Steel</strong> K-500 Monel<br />
Body (1) A216GrWCC A352GrLCC A216GrWCC A352GrLCC A487Gr4N (3)<br />
Bolting – Cover A193GrB7 A320GrL7 A193GrB7M A320GrL7M A193GrB7M (2)<br />
Bolting – Gland A193GrB7 A320GrL7 A193GrB7M A320GrL7M A193GrB7M (2)<br />
Bolting – Gear Flange A193GrB7 A320GrL7 A193GrB7M A320GrL7M A193GrB7M<br />
Check Valve Carbon <strong>Steel</strong> Stainless <strong>Steel</strong><br />
Cover (1) Carbon <strong>Steel</strong> Carbon <strong>Steel</strong> (3)<br />
Diaphragm – Thick Carbon <strong>Steel</strong><br />
Diaphragm – Thin Stainless <strong>Steel</strong><br />
Equalizer Alloy <strong>Steel</strong> Alloy <strong>Steel</strong> .003 ENP Alloy <strong>Steel</strong> (3) .003 ENP<br />
Gasket<br />
Graphite and<br />
Stainless <strong>Steel</strong><br />
Gear Flange Wrought Carbon <strong>Steel</strong> Carbon <strong>Steel</strong><br />
Gland Ductile Iron Ductile Iron .003 ENP<br />
Nameplate Stainless <strong>Steel</strong><br />
Packing Graphite and Fluoropolymer Compound<br />
<strong>Plug</strong><br />
Retaining Ring<br />
<strong>Steel</strong> in size 6 & 8 ASME Class<br />
1500, and size 10 & smaller<br />
Class 2500. ASTM A-48 iron<br />
in all other sizes and ASME<br />
pressure classes. <strong>Plug</strong>s have<br />
coating of low coefficient<br />
friction material.<br />
Alloy <strong>Steel</strong> HRC 22 Max. .003 ENP<br />
Carbon<br />
<strong>Steel</strong><br />
Sealant Fitting Carbon <strong>Steel</strong><br />
Spring Stainless <strong>Steel</strong> Inconel X-750<br />
Stem (1)<br />
(Wrench-Operated)<br />
Stem (1)<br />
(Gear-Operated)<br />
Stem Ring<br />
Stainless <strong>Steel</strong> Stainless <strong>Steel</strong><br />
Alloy <strong>Steel</strong> (3) HRC 22<br />
Max. .003 ENP<br />
Carbon <strong>Steel</strong> .001 ENP<br />
Stainless <strong>Steel</strong> (3)<br />
HRC 22 Max.<br />
Wrought Carbon or Low Alloy <strong>Steel</strong> Alloy <strong>Steel</strong> HRC 22 Max. Alloy <strong>Steel</strong> (3) HRC 22 Max.<br />
Carbon<br />
<strong>Steel</strong><br />
Stop Collar Wrought Carbon <strong>Steel</strong><br />
Wrought Carbon <strong>Steel</strong><br />
Thrust Button Nickel <strong>Steel</strong> Wrought Carbon <strong>Steel</strong><br />
Weatherseal – Cover Neoprene<br />
Wrought Carbon<br />
<strong>Steel</strong> .001 ENP<br />
Weatherseal – Stem Buna-N Polyurethane<br />
Zinc Washer Zinc<br />
Grease Fitting Not Applicable Stainless <strong>Steel</strong><br />
(1) Category B and D valves are impact-tested to 20/15 ft-lb values.<br />
(2) Plastic-coated.<br />
(3) 100% hardness-tested.<br />
(4) OS denotes offshore construction.<br />
<strong>Nordstrom</strong> <strong>Valves</strong> <strong>Steel</strong> Lubricated <strong>Plug</strong> <strong>Valves</strong> FCD NVENBR1004-02 – 01/11
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