The first digit (3) indicates the port arrangement.

• 3 = 3600 Series with right angle ports
• 4 = 4600 Series with straight through ports

The second digit (6) indicates a packing seal.

• 2 = Triple Lip Seal with Back-Up Packing
• 5 = Triple Lip Seal
• 6 = Packing

The third and fourth digits (11) indicate the approximate theoretical displacement in U.S. gallons per 100 revolutions. Gallons/100 Rev. [Liters/100 Rev.]

• 11 [41.6]
• 17 [64.4]
• 22 [83.3]

The letter or group of letters(CP) indicates lobe options (precedes letters to indicate pump arrangement).

• CP – Wing-style lobes

The letter or group of letters (HB) indicates the pump head arrangement. Backplate machined for cartridge seal use.

• HB = Pump with outboard bearing
• GHB = Pump with outboard bearing and built-on gear reduction unit
• BH = Pump without outboard bearing to accommodate close coupled hydraulic drive auxiliaries through a rigid coupling.

On GHB pumps, the letter (O) indicates pump with outboard bearing and auxiliary mounting provisions (does not include built-on gear reduction unit).

The letter (F) indicates port style

• F = Pump with Roper standard flange ports

The letters (RV) indicate type of faceplate on pump.

• RV = RV style single direction relief valve faceplace (Standard RV, Jacketed RV)
• BV = Bi-directional relief valve faceplate
• No Letters = Plain Faceplate

The letter or group of letters (X, LX) indicates direction of rotation and shaft position. The letter (L) indicates low drive unit. If the letter (L) is not used, the shaft will be in a high drive position.

• No letter or W = Clockwise Rotation (Standard Rotation)
• X = Counterclockwise Rotation
• Y = Clockwise Rotation
• Z = Counterclockwise Rotation
• LW = Clockwise Rotation
• LX = Counterclockwise Rotation
• LY = Clockwise Rotation
• LZ = Counterclockwise Rotation

Occasionally, special pumps or configurations are required which are unique for a particular application. These modifications are clarified by a SPECification number. Identification of any items different than a standard pump can be made by consulting Roper Pump Company or an authorized distributor.

The TYPE number is a number used by Roper Pump Company for in-house identification of construction. Always include the type number in any references to the pump.

• A = low pressure spring (standard)
• B = high pressure spring

The SERIAL number is a unique number assigned to each pump built by Roper Pump Company.

In any communication concerning this pump, always be sure to include the Figure, Spec, Serial, and Type numbers so proper identification of the pump can be assured.