What is the difference between API 674 and API 675?

What is the difference between API 674 and API 675?

API 674 pumps typically are lighter and, with their vertical plunger configuration, occupy a smaller footprint than equivalent API 675 double diaphragm pumps.

What is an air operated diaphragm pump?

What is an Air-Operated Double-Diaphragm pump? An Air-Operated Double-Diaphragm pump (AODD) is a type of positive displacement (PD) pump. It consists of two pumping chambers that are alternately filled and discharged by the movement of flexible diaphragms.

What is api675?

API 675 is a comprehensive standard issued by the American Petroleum Institute (API) that is intended to provide a purchase specification covering controlled volume, positive displacement (PD) pumps for petroleum, chemical and gas industry services.

What is API 675 pump?

The API 675 specification identifies requirements for reciprocating metering pumps used in the petroleum, petrochemical and gas industry services. It provides a framework for pump manufacturers and purchasers to agree on the design, fabrication and testing of a metering pump.

How do I size an air operated diaphragm pump?

So, the rule of thumb is as follows: take the liquid flow rate of the pump you’re considering and multiply that number by 0.75. That’s the CFM you’ll need for most cases. For example, if you’re looking at the SimpleSpirits 43, its liquid flow rate is 49 GPM.

How does Wilden pump work?

The compressed air is applied directly to the liquid column separated by elastomeric diaphragms. The diaphragm acts as a separation membrane between the compressed air and liquid; a balanced load removes mechanical stress from the diaphragm. The compressed air moves the diaphragm away from the center of the pump.

Which pump is operated by compressed air?

Air operated double diaphragm pumps is a type of positive displacement pump but what sets it apart, is that it uses compressed air to operate.

What is api685?

This API standard specifies the minimum requirements for sealless centrifugal pumps for use in petroleum, heavy duty petrochemical and gas industry services. This standard is applicable to single stage overhung pumps of two classifications, Magnetic Drive Pumps (MDP) and Canned Motor Pumps (CMP).

What are the 2 basic designs for positive displacement pump?

Positive-displacement pumps can be divided into two major types: rotary and reciprocating. All rotary pumps use some form of rotating element, such as gears, vanes, or lobes to increase the discharge pressure.

What are the API pump design standards?

American Petroleum Institute (API) has specified following pump design standards for different kinds of pumps. Specifies requirements for centrifugal pumps, including pumps running in reverse as hydraulic power recovery turbines, for use in petroleum, petrochemical, and gas industry process services.

What is API STD 675?

API Std 675 – Positive Displacement Pumps—Controlled Volume for Petroleum, Chemical, and Gas Industry Services Covers the minimum requirements for reciprocating, controlled volume pumps, and pump units for use in the petroleum, petrochemical, and gas industry services. These pumps are either hydraulic diaphragm or packed plunger design.

Is the international standard applicable to all types of pumps?

This International Standard is applicable to overhung pumps, between bearings pumps, and vertically suspended pumps. Clause 9 provides requirements applicable to specific types of pumps. All other clauses of this International Standard apply to all pump types.

What is the international standard for pumping system energy assessment?

This International Standard sets the requirements for conducting and reporting the results of a pumping system energy assessment (hereafter referenced as “assessment”) that considers the entire pumping system, from energy inputs to the work performed as the result of these inputs.