WORLD PUMPS October 2011Product news 7

www.worldpumps.com

Natural gas compressor line for wellheadsBlackmer has developed a natural

gas vapour recovery compressor

that has been designed to

handle wellhead operations in

continuous duty or remote

unmanned locations.

The NG Series comprises a

single-stage, oil-free recipro-

cating gas compressor that can

be used in oil and gas produc-

tion in the areas of tank-battery

vapour recovery, wellhead

vapour control, wellhead

annulus reduction and pressure

boosting.

Blackmer's compressers feature a

full compartment distance piece

as standard on all NG models.

Each NG compressor is

constructed with two sets of

piston rod seals between the

crosshead guide and cylinder

area, which form the distance

piece. The distance piece

provides leakage control and

helps prevent oil contamination

from any condensates that

might be in the gas stream.

Connections are provided in the

distance-piece for purging,

pressurizing or venting as

needed. This design also allows

the NG compressors to handle a

much wider range of suction

pressures, which can be a major

consideration in wellhead

operations that involve natural

gas and methane mixes.

The NG Series compressors also

feature a ductile-iron head and

cylinder, o-ring gaskets

throughout, flow rates to 600

MSCFD, a maximum of 50-horse-

power energy usage and a

maximum allowable working

pressure of 350 psia (24.1 bar).

www.blackmer.com

ANSI, end-suction low flow rangeRuhrpumpen has added a new

ANSI, end-suction low flow

centrifugal pump to its standard

product line. The CPP-L is the low

flow version of the CPP-21 and

has been designed to fill the gap

on the low flow side of the

CPP-21 range.

The new pump complies with

the ANSI B73.1 standard and this

pump can be used to replace

existing equipment without any

problem. There will be no need

for piping or base changes.

With low flow applications it is

important to reduce the thrust

load and seal chamber pressure,

and Ruhrpumpen’s radial vane

impellers for the CPP-L are

specially designed to provide a

better hydraulic control. With its

balance holes it reduces the

thrust load prolonging bearing

and seal’s life.

www.ruhrpumpen.com

Ruhrpumpen’s low flow centrifugal pump.