TEL: +86-13705425163; FAX: +86-532-82599806 www

39 XING HE RD, INDUSTRIAL YARD LANCUN TOWN, JIMO, QINGDAO, SHANDONG，CHINA

E-Mail: sales3@pumpparts.cn SKYPE: oilfieldman2 .pumpparts.cn

HW446 Mud Pump

一、 HW446 Mud Pump TECHNICAL SPECIFICATION

Rated input power 328KW (440HP)

Rated Stroke 320 Stroke/Minute(320SPM)

Stroke 152.4mm （6"）

Gear Ratio 4.578 ：1

Max. operation pressure 35Mpa

Valve chamber Valve-Over API 4#

Max. liner dia. 6″

Max. liner mud pressure（160 stroke/minute）16.9Mpa

Dia. of suction manifold, 6″ (150#) Flange

Dia. of discharge manifold 3″(900#) Flange

Dia. pinion shaft 95.25 mm(3.75″)

Key 22.174x15.9mm

Dimension：（No included base）, 2479X1219X1103 mm

Weight 4463 kg

Qingdao HNA Oilfield Equipment Manufacturing Co.,Ltd

二、 Structure character

HW-440/446 Pump can be widely used in all kinds of works in oil field. When the cylinder liner

specification is 6"-3 1/2", piston structure is recommended and it is suitable for Oil-Well Repair and

shallow-well drilling, etc. When the cylinder liner specification is 3 1/4"-2", axial piston structure is

recommended and it is suitable for high-pressure work.

The Pump stand is constructed of steel plates by welding. Furthermore, because the post weld

annealing treatment is applied to eliminate the internal stress, its strength is high and its steel is good.

Moreover, the strengthening plate structure is adopted in the crank shaft bearing house and the main

bearing house, therefore its strength is high and its steel is good.

The crank shaft is constructed of forgings in balance, and thus it is light in weight and it runs smoothly

without any vibration.

The gear shaft is made of forgings of alloy steel and the herringbone gear as a whole is installed with

medium hardness tooth surface gear on the shaft.

The cross head is made of ductile cast iron by entire cast which thus makes the wear-resistant good.

The guide plate is formed in up- and - down structure which thus can adjust the concentricity by the

gasket in the up or the down gasket.

The hydraulic cylinder is made of alloy steel cast in straight-through type and its volume small and

volumetric efficiency high. Furthermore, the surface of the cylinder has been treated with chemical

nickel-plating to enhance its wear-resistant.

The cylinder liners of the W440/446 pump have a same sized external diameter. The fasten effect is

achieved by the squared cylinder liner pressing cover and the bolt pressing the hydraulic cylinder. The

seal between the cylinder liner and the hydraulic cylinder is achieved by the rubber mat in rectangle.

In the lubrication system, the forced lubricating is adopted. The gear oil pump, which is installed in the

oil rank, transmits the pressured oil, through lubrication lines, into the cross head guide plate and all the

shafts to achieve the forced lubrication and cooling purpose.

三、 Performance parameter table

TEL: +86-13705425163; FAX: +86-532-82599806 www

39 XING HE RD, INDUSTRIAL YARD LANCUN TOWN, JIMO, QINGDAO, SHANDONG，CHINA

E-Mail: sales3@pumpparts.cn SKYPE: oilfieldman2 .pumpparts.cn

Qingdao HNA Oilfield Equipment Manufacturing Co.,Ltd

HW-446 Performance

Liner Size, inches

Rated Pressure, psi

Pump Speed Input Power

6

1,027

5-1/2

1,222

5

1,479

4-1/2

1,710

4

2,169

3-1/2

2,816

SPM

320

HP

440

661

555

Displacement, GPM

459 397

313

240

270

220

170

120

70

380

320

260

200

200

551

441

330

220

110

463

370

278

185

93

382

306

229

153

76

335

273

211

149

87

264

215

167

118

69

202

165

127

90

52

Volume/Stroke, gallons

2.203

1.851

1.530

1.239

0.979

0.750

Ratings are based on 90% mechanical efficiency and 100% volumetric efficiency.

Mechanical Efficiency η=90%，Fill factor α=100%，Volumetric Efficiency:100%

TEL: +86-13705425163; FAX: +86-532-82599806 www

39 XING HE RD, INDUSTRIAL YARD LANCUN TOWN, JIMO, QINGDAO, SHANDONG，CHINA

E-Mail: sales3@pumpparts.cn SKYPE: oilfieldman2 .pumpparts.cn

Qingdao HNA Oilfield Equipment Manufacturing Co.,Ltd