Emission Containment Reciprocating Pumps

For Hazardous Applications

The environment is an increasingly sensitive issue and industry has a duty to control the escape of pollutants. This is a challenge to a reciprocating plunger pump because they feature dynamic sealing where leaking media is necessary to prolong seal life. Until recently, this was an accepted trade off where high pressures required this type of pump.

Pumps where emissions can be controlled, contained or even prevented are increasingly in demand where recent fugitive emission regulation has been introduced. Pressure is now being applied to the Oil and Gas, Petrochemical and Chemical companies to prevent the release of toxic and hazardous media to atmosphere.

This is why Ruhrpumpen Engineers have developed a range of Seal Plans and Emissions Containment products to deal with the escape of pollutants in reciprocating pumps.

When do I need Emission Control?

Like the Zero Emission Magnetic Drive Centrifugal Pump equivalent, generally when the product being pumped is of a hazardous nature. The RDP Zero Emission system will prevent the leakage of any fluid, saving you from the loss of potentially toxic, explosive, corrosive or costly liquids and gasses. RDP Zero Emission and containment systems ensure compliance with strict environmental and safety regulations for many industries.

Reciprocating Plunger Pump by Ruhrpumpen

Emission Containment Seal Plans for Refineries using reciprocating pumps

Effective Sealing... the advantages

The added value of an appropriate seal plan far outweighs the initial investment. Proper management of the Seals in reciprocating pump provides certain benefits.

  • Reduced Maintenance intervals
  • Condition monitoring
  • Zero leakage to atmosphere
  • Increased efficiency
  • Greater reliability
  • Increased safety
  • Legislation compliance
  • Cooling or heating of media

Ruhrpumpen offers a range of products to suit a range of applications and budgets. The Seal system comprises two elements, the Seal Arrangement itself and, as applicable, the Seal Plan.

Seal Plans

All Reciprocating pumps feature a stuffing box where the packings are fitted. The packings exert pressure around the wear hardened plungers and thus provide the required sealing. Each application presents unique demands on the packings or seal arrangement. In RP, we offer systems constructed around either the well-established compression packing, or custom designed chevron seal rings, in a variety of carefully selected materials. A typical arrangement may also include anti-extrusion rings and ‘live loading’. ‘Live loading’, or Spring energization, removes the need for regular adjustment and reduces maintenance cycles.

In addition to the Seal Arrangement, and depending on the application, we can introduce Seal Flush or Forced Lubrication systems. These provide lubrication when media is naturally non lubricious, cooling or heating where necessary and flush particulates away from the seal stack.

Reciprocating Pump Components

Although you may be new to API 674 Reciprocating Pumps, you should be familiar with API 682 seal plans nomenclature. API 674 reciprocating pumps do not use seal plans in the same sense as centrifugal products. Download our Seal Plans Summary to learn more about some of the parallels between systems:

Download the Reciprocating Pumps Seal Plan Summary

Emission Containment

A further use of the Seal Plan is to introduce a barrier fluid at a pressure higher than process. This forces media to migrate towards the front of the stuffing box (back towards the process line) rather than out to leakage. In this way hazardous fluids can be successfully contained.

All RDP pumps feature a Distance Piece Chamber where any leakage escaping the stuffing box gathers and subsequently can be directed safely to drains or as preferred for disposal.

Zero Emissions

In addition to the containment systems just described, Ruhrpumpen have introduced additional measures to prevent the escape of toxic or hazardous gasses thus making the RDP Pump truly emission free. A gasket seals the top of the Distance Piece Chamber, whilst the addition of proprietary plunger Flexiseals provide a totally gas tight barrier isolating the process within the pump. In this way all fluid leakage is under control and gaseous escape fully contained.

Gas Distance Piece Chamber with Flexiseals

Reciprocating Plunger Pumps Applications:

Oil & Gas

  • Methanol & Glycol Injection
  • Closed Drains (slops injection)
  • Produced Water Injection
  • Hydrocarbon Condensate
  • Crude Transfer
  • Caustic Solutions
  • LDHI (Low Dosage Hydrate Inhibitors)
  • Pipeline Corrosion Inhibitor Injection
  • Acidising
  • Asphalten
  • Diesel Fuel

Gas Treatment

  • Amines (gas sweetening)
  • Glycol Circulation (gas dehydration)


  • Residues upgrading (H-Oil, LC Finer)
  • Residues gasification


  • Heavy oil with suspended particulates (ash, soot, catalysts)
  • High temperature / High pressure Hydrocarbons
  • Waxes
  • Hydrocarbon Condensate
  • Slop Oil
  • Bitumen
  • Hydrotreating
  • Hydrocracking
  • Hydrofinishing
  • Visbreaking (breaking / reducing viscosity of residual oils)
  • Dewaxing
  • Residue Gasification
  • Heavy Oil Upgrade

Chemical & Petrochemical

  • Ethylene
  • Methanol
  • LPG / Butane
  • Melamine
  • Polyethylene
  • Alcohol and Resin
  • LDPE
  • Polyethylene Monomer Feed Pumps
  • Methacrylic Acid Dosing
  • Acrylic Dosing
  • Propylene
  • Ester


  • Carbamate
  • Ammonia / Urea