Terms and conditions

Emerson guarantees that all the items

produced are free of defects in workmanship

and manufacturing materials and meet

relevant current specifications, provided they

are installed, used and serviced according

to the instructions contained in the present

manual  The warranty can last either one

year from the date of installation by the initial

user of the product, or eighteen months

from the date of shipment to the initial user,

depending on which event occurs first  all

detailed warranty conditions are specified in

the documentation forwarded together with the

product  This warranty does not cover special

products or components not warranted by

subcontractors, or materials that were used

or installed improperly or were modified or

repaired by unauthorized staff  In the event

that a fault condition be caused by improper

installation, maintenance or use, or by irregular

working conditions, the repairs will be charged

according to applicable fees.

Before installation these instructions must be fully read and understood

General warnInGs

IMPorTanT

The manual is an integral part of the machine. It

should be read carefully before carrying out any

operation and should be kept for future reference.

Generalities

Biffi actuators are conceived, manufactured

and controlled according to a Quality control

system in compliance with EN IsO 9001

international regulation.

Applicable regulation

EN IsO 12100-1: 2005: safety of machinery

– Basic notions, general design principles

Part 1-Basic terminology, method

EN IsO 12100-2: 2005: safety of machinery

– Basic notions, general design principles

Part 2-Technical principles and specification

2006/42/Ec: Machine directive

97/23/Ec: Directive for pressure PED equipment

2006/95/Ec: Directive for low voltage equipment

2004/108/Ec: Directive for the electromagnetic

compatibility

94/9/Ec: Directive and safety instructions for

use in hazardous area

The BIFFI PHW Power Hand Wheel series has been engineered and

manufactured to provide easy and quick operation ofpipeline valves

equipped with a gear reducer instead of the operation of turning

manually the gear reducer’s hand-wheel.

GENERAL APPLICATION

Power Hand Wheel Unit is designed for theoperation of linear and quarter

turn valveson pipelines where power source (Electric,Pneumatic,

Hydrauliclis not available.

TECHNICAL DATA

Ambient Temperature: from-30C to 80C

Oil Flow rate into the range: rom 10 V/min to 60 V/min

Supply Medium: Mineral oil

Oil Max Flow rate(for 140 bar max oil pressurel: 70V/min

Oil Supply pressure into the range: from 25 barg to 170 barg 

Output torques (without bevel gearl: up to1200 Nm

Max. Supply pressure (for intermittent duty): 200 barg

Speed (without bevel gear): up to 144 rpm (higher speeds on request）

Bi-directional travel stops

Adjustable stops on each end cap provide the flexibility of accurate valve rotation

positioning at the end of the ‘open’ and ‘close’ stroke. Both stops are located

on the cylinder centerline, the optimal osition to maximize travel adjustment

and eliminate any detrimental side loading on the travel stops.

Adjustable from 82° to 98°.

Ingress protection

Standard IP66. Optional IP68.

Spring designed for safety

All spring return models incorporate a ‘man-safe’ spring design that allows

the actuator to be safely assembled and disassembled in the field without

the need for special tools. The integral tie rods are bored and tapped to

provide a means of loading and unloading the spring in a safe andconvenient

manner.

DESIGNED WITH A HEART OF STAINLESS STEEL

Stainless steel yoke

The heart of any scotch yoke actuator is the yoke. S series actuators use

17-4PH stainless for this critical area as standard.

The yoke is the mechanism used to convert linear force to torque.

This area is most often where the life of the actuator is controlled.

Principles of construction

Using high quality materials of construction and modern rugged design

concepts provides the standard for high quality, low cost valve actuation.

The S actuator housings are all machined from 316 stainless steel castings.

This produces a rugged, low cost product through reduced machining time

and by eliminating wasteful excess material.

Any components that rotate or slide during operation, such as the high

strength stainless steel output shaft, stainless steel piston rod, stainless steel

thrust pin or the stainless steel piston, are all supported by replaceable friction

reducing bearings.

Double-acting and spring-return pneumatic quarter-turn

actuators for on-off and modulating control of valves in

heavy-duty service. Available for output torques to

1.000.000 Nm.

General Application

ALGA, ALGAS and ALGAS-QA pneumatic actuators are

designed for on-off or modulating control of quarter-turn

ball, butterfly, plug or damper style valves.

Features

• Totally enclosed, weatherproof housing in fabricated

carbon steel for maximum strength.

• Guide bar resists transverse loads and supports the

piston rod.

• Hard chromium plated alloy steel material guarantees

corrosion protection and minimal friction.

• Polytetrafluoroethylene (PTFE)-impregnated bronze or

sintered bronze bushings provide minimal friction and

extended service life.

• Scotch yoke design with canted or symmetric torque arm

allows close working to distinctive valve torque profiles.

• External travel stops for precise angular stroke

adjustment 90° ±4° at each end of travel.

• Electroless nickel plated and polished cylinder provides

maximum corrosion resistance and reduces friction.

• Floating type piston seals provide low hysteresis and

high sensitivity, preventing sticking problems.

• ALGAS spring-return pack incorporates up to four

springs, fully encapsulated in a factory welded cartridge

ensuring personnel safety and simplifying assembly.

• ALGAS spring action can be changed easily in the field

from to close to open or vice versa.

• Special coatings for offshore or corrosive environments.