EMERSON Bettis CBA300 CBB CBA300-Series Pneumatic Valve Actuator Instruction Manual

: June 4, 2024
: Emerson

Table of Contents

Section 1: Major Component Material List
Section 2: Seal Material List
Section 3: Typical Coatings
01-02 Singapore 629361
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CBA300 CBB CBA300-Series Pneumatic Valve Actuator

Bettis CBB/CBA300-Series, Pneumatic Valve Actuator
Component Material List

Material List
ML.CBx.01.01 Rev. 2
February 2022
Instruction Manual

Section 1: Major Component Material List

1.1 Typical CBB-Series Major Component Material List
Figure 1 CBB-Series Major Components

Table 1. Material List

I tem	Description Housing	Material

1.2 Typical CBA300-Series Major Component Material List
Figure 2 CBA300-Series Major Components

Table 2. Material List

Item	Description	Material

Section 2: Seal Material List

2.1 Typical CBB/CBA300-Series Seal Material List
Table 3.

Description	Type	Application
Piston OD / Cylinder ID	O-ring / D-ring	Dynamic
Piston / Centerboard	O-ring / T-seal	Dynamic
Torque shaft	O-ring	Rotary
All remaining seals	O-ring	Static

Section 3: Typical Coatings

3.1 Nitriding
Bettis utilizes a Nitride surface finish on many component parts instead of Chrome or Nickel plating.
The nitrided surface is not a coating, it is an integral part of the component base material. Because of this, it will not pit, crack, chip, or flake off and any possibility of hydrogen embrittlement (a common problem in any plating process) is eliminated.
The Nitride surface layer is extremely hard and displays improved wear resistance when compared with plated coatings. Dent resistance is also improved.
The Nitride surface layer has also been shown to display superior corrosion resistance to plated coatings.
Nitride surface finishing has become very popular in the fluid power industry in the past decade replacing chrome and nickel plating in many applications.
Typical components – piston rods, tie bars, CBB centerboard, cylinder bores, pistons. The typical process results in a thin surface layer of iron oxide over the second layer of porous Iron Nitride over the third layer of non- porous Iron Nitride are all fused on top of the base substrate steel material.
3.2 Teflon Lined Cylinder Bores
The standard coating on all Bettis pneumatic cylinder bores is Xylan, a proprietary Teflon coating.
The use of this Teflon lining results in superior corrosion resistance while improving seal life and overall actuator performance.
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