Below are some common questions that may be helpful. Please contact us if you have additional questions.

 
Our Capabilities
What are Nor-Cal Products, Inc. dba Pfeiffer Vacuum Valves & Engineering's custom vacuum design and engineering capabilities?
What cleaning processes are applied to stainless steel vacuum components?
What surface treatment options are available for vacuum components?
What vacuum component manufacturing services do we offer?
Flanges and Fittings
Can you use metal gaskets more than once?
What are the advantages & disadvantages of metal seals and elastomer (o-ring) seals?
What are the differences between formed bellows and edge-welded bellows?
What are the different finishes available on fittings and tubings?
What is the advantage of silver-plated bolts?
Why are there several different metal gasket materials available?
Why buy a flexible metal hose when a PVC or short flexible coupling is available?
Why would you need a plate nut?
Chambers, Feedthroughs, Manipulations, and Viewports
Can you add motor drives to manual feedthroughs?
How can I reduce the cost of a custom chamber?
How do I prevent cracking my viewport?
What are double wall chambers?
What are the advantages of a PV V&E chamber?
What chamber shapes can PV V&E build?
What is a differentially-pumped rotary seal?
What is an explosion bond?
What is the difference between Vented and Non-Vented vacuum bolts?
What is the maximum size of a chamber that PV V&E can build?
What metals does PV V&E use to construct a chamber?
How can I reduce the cost of a custom chamber?
Isolation Valves
Please explain "NO" and "NC" options on your valves.
Can a motor be added to a ball valve?
Can I add a motor to my pneumatic isolation valve to make it control?
Can Pfeiffer Vacuum valves be used in liquid environments?
What is a "lockout" feature?
What is the difference between ISO and JIS flanges?
Which valve do I need for my application?
Why would I need a pump-out port?
Will PV V&E repair the leaky bellows in my valve?
Pressure Control Valves, Controllers, and Capacitance Diaphragm Gauges
Can PV V&E provide a complete solution that includes everything to control pressure in my system?
Are Nor-Cal Products, Inc dba Pfeiffer Vacuum Valves & Engineering Intellisys controllers CE compliant?
Can I add Intellisys pressure control to a valve I already own?
Can I improve the performance of my system by simply switching to Intellisys?
Can Nor-Cal Products, Inc dba Pfeiffer Vacuum Valves & Engineering provide a pressure control evaluation demo for me to try out?
What is DeviceNet?
What pressure range will Intellisys valves control to?
Which pressure control valve do I need for my application?
General - Tariff Surcharge
What is a tariff surcharge and why is it being applied to my order?
How is the tariff surcharge calculated?
Which products are affected by the tariff surcharge?
Is the surcharge included in the price shown online?
Will the quote I received online include the tariff surcharge?
Can I get a breakdown of the surcharge amount on my invoice?
Are tariffs permanent or will they change?
Are there any ways to avoid or reduce the surcharge?
Order and Checkout
Can I see the surcharge before placing my order?
Will the surcharge be refunded if I return my item?
If I place a backorder now, will the surcharge change later?
Are surcharges different for bulk or wholesale orders/quotes?
Will my quote remain valid if tariff rates change?
Can you honor a previous quote without the surcharge?
How long are quoted prices guaranteed?
Is the surcharge applied per item or per order?
How will I know if a product I want to order is affected by tariffs?
Can I dispute the surcharge?
Where can I find updates about tariff changes?

 

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