W.E. Anderson阀门常见问答
W.E. Anderson Valves
Q. What isthe key feature of both Proximity position indicators and levelswitches that sets these products apart from allcompetitors?
A. Magnetic coupling.
Q. Hi-FlowTM controlvalves call out ANSI B16.104 Class IV flow leakage. What does thismean?
A. ANSI B16.104 is a testingspecification for control valves. This specification has actuallysuperseded by ANSI/FCI 70-2 Class IV. The class IV designationdefines the allowable amount of leakage through the valve seat inthe closed position. Class IV allows for .01 percent of the ratedflow (Cv), to pass through the seat. Class IV is common for metalto metal seated valves.
Q. What if I need parts for my Hi-FlowTM control valve?
A. Many Hi-FlowTM valves have been in service for 15+ years with all original parts. However, since Hi-Flow TM valves are commonly used in steam service, a severe application, some parts may wear over time. Unlike other control valves, Hi-FlowTM valves are designed with removable seat rings making repair or replacement of components an option. Although all parts are available, you will probably never need more than a seat ring, plug assembly, and stem packing to have a valve that is like new.
Q. What are Plast-a-Vane® butterflyvalves?
A. Plast-a-Vane is a tradename for the W.E. Anderson line of butterfly valves.Plast-a-Vane® is derived from the unique thermoplasticdisc used in our valve design. The disc is made fromNoryl® GFN-3, a General Electric thermoplastic resin.This resin has excellent chemical compatibility and can be used inmedia ranging from glycol to most concentrations of sulfuric acid.The smooth molded surface resists abrasion and provides lowoperating torques. In addition to Noryl®, disc materialsinclude Aluminum-Bronze alloy, 316 Stainless Steel, and epoxycoated ductile iron.
Q. What two basic types of position indication are providedwith the Proximity position indicator?
A. Visual (mechanical) andelectrical.
Q. How many different size housings does Proximity providefor position indication? How many switches in a singlehousing?
A. Two sizes: 2-switch and4-switch housings.
Q. What is IP68?
A. I.P. = Ingress Protection;submersible certification - all tests - solids (0-6) and liquids(0-8).
Q. What two types of continuous signal feed back canProximity provide with the position indicator?
A. Resistive (potentiometer)and current (transmitter).
Q. What are the two dry product level switch model types?What ranges do they cover? How are they adjusted? How manyset-points do they have?
A. GSD3DA - gravity(elastomer) suspension, aluminum housing, polyurethane diaphragm,standard 15 amp switch. PSD16A - pneumatic (fabric), suspension,aluminum housing, filter fabric diaphragm, polyester 150 micronpermeability, standard 15 amp switch. They can be adjusted to anylevel. They are adjusted by a screw adjustment. One setpointavailable.