QWS2500 fluid end assembly with suction manifold

QWS2500 Stainless Steel Fluid End

100% Interchangeable with GD/SPM/JMAC/SJS QWS2500 fluid end.

QWS2500 fluid ends, also called 2500hp quintuplex fluid end, is one of the most featured products of TianyuMfg due to the high demand on the market.

TianyuMfg makes QWS2500 fluid ends in two materials, Carbon steel and stainless steel. We are the first one in China to manufacture frac pump stainless steel fluid end for the US market. For now, TianyuMfg has been manufacturing stainless steel made QWS2500 fluid ends for over 8 years and supporting Texas oilfields with thousands of high-quality QWS2500 stainless steel fluid ends.

TianyuMfg stainless steel made fluid end modules feature in super long service lifetime, The max. pumping hours of our S.S made QWS2500 fluid ends that we got from one customer in West Texas oilfields was 3680 hours in the year 2018.

TianyuMfg manufactures not only QWS2500 stainless steel fluid end blocks, but also fluid end assemblies dressed with robust and prolonged components inside. Let us help you strengthen your fracturing fleet performance while reducing the overall cost.

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Plunger Diameter Output per rev Displacement at Pump Stokers Per Minute
In GPR 100 150 200 250 300
GPM PSI GPM PSI GPM PSI GPM PSI GPM PSI
3 1/4 1.44 144 20,000 218 14,285 288 10,715 380 8,570 475 6,489
3 1/2 1.67 167 17,260 251 12,295 334 9,240 418 7,386 551 5,600
3 3/4 1.91 191 15,020 287 10,755 382 8,080 479 6,455 630 4,900
4 2.17 217 13,205 328 9,465 434 7,110 543 5,685 716 4,318
4 1/2 2.75 175 10,495 413 7,470 550 5,819 688 4,489 909 3,400
5 3.4 340 8,450 510 6,060 680 4,640 850 3,630 1122 2,760
5 1/2 4.11 411 6,985 617 5,000 822 3,755 1028 3,000 1356 2275
5 3/4 4040 449 6,390 674 4,580 898 3,435 1128 2,750 1482 2,080
6 4.89 489 5,879 734 4,208 978 3,195 1228 2,525 1619 1,910
6 1/2 5.74 574 5,000 861 3,585 1148 2,690 1435 2,180 1894 1,680

TianyuMfg supplies fluid end parts and power end parts 100% compatible with original SPM QWS2500 Pumps.

Below is the BOM drawing of QWS2500 4.5″ fluid end for your reference.

QWS2500 FLUID END PARTS

Related Products

QWS2500 frac pump
ht400 fluid end
TWS600 FLUID END
QWS1000 FLUID END
TWS2250 FLUID END
Y type quints fluid end

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Stainless Steel Fluid End- THE ULTIMATE GUIDE

Frac fluid ends have remained the most efficient, easy-to-use, and versatile waterblast tools available, making them an essential tool in the pressure pumping industry.

However, the need for modern, reliable, and high-quality Frac fluid ends is indispensable for improved productivity and profitability, so lots of fracturing companies worldwide have been starting to use stainless steel fluid end to replace carbon steel fluid end in the fracturing process.

This is an ultimate FAQ guide covering every question you will ever have to ask regarding the stainless steel fluid ends.

Let’s get started.

What is a Stainless Steel Fluid End?

What Material Grades are Available for Your Stainless Steel Fluid End?

What is the Difference Between Stainless Steel Fluid Ends and Carbon Steel Fluid Ends?

What is the Life Span of Stainless Steel Fluid Ends Compared to Carbon Steel Fluid Ends?

Can Stainless Steel Fluid End Withstand High Pressures and Highly Corrosive Fluids?

Are Stainless Steel Fluid Ends Fatigue Cracking Resistant?

Are Stainless Steel Fluid Ends Built to Withstand Washout?

Do you Need to Worry About Cavitations in Your Stainless Steel Fluid End?

Are stainless steel fluid end modules easy to maintain?

Can Stainless Steel Fluid End Minimize Flexing Stress Amplitude for Improved Pressure Cycles?

How do you Prevent Sand Packing in Stainless Steel Fluid End?

What Stainless Steel Fluid Ends does TianyuMfg Manufacture?

FAQ: Which Material is Used to Manufacture a Fluid End?

Frac pump fluid end generally is made of high-quality forging block. Most often, the fluid end modules are made of forged carbon steel and stainless steel. To gain greater strength and reliability,  forged stainless steel was first introduced to the market in 2012.

Compared with carbon steel fluid end, Stainless steel fluid ends perform better for their strength, consistency, and quality in combat corrosion and consistent fracturing jobs. The use of stainless steel instead of carbon steel has enhanced fluid end frac pump life by three to four times. However, the figure is not exact because the lifespan varies depending on the use.

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FAQ: What Material Grades are Available for Your Stainless Steel Fluid End?

At TianyuMfg, we manufacture mainly two standard grades of stainless steel fluid ends. These two materials can meet or exceed your requirements in well service applications and fracturing performance.

These two material grades are precipitation hardening stainless steel: 17-4PH and 15-5 VAR.

FAQ: What is the Difference Between Stainless Steel Fluid Ends and Carbon Steel Fluid Ends?

Stainless steel fluid ends and carbon steel fluid ends have the most obvious differences in the performance lifetime and also the prices.

Given the differences in the materials themselves, stainless steel fluid ends offered better microstructure and grain size, the strength, and ductility of stainless steel are also improved to provide for stronger fatigue resistance. The service lifetime of stainless steel fluid end could be three or four times of carbon steel made fluid end, which the price is less than doubled price of the latter.

FAQ: What is the Life Span of Stainless Steel Fluid Ends Compared to Carbon Steel Fluid Ends?

TianyuMfg carbon steel Triplex (2250) and Quint (2500) typically run 500 to 800 pump hours. Stress corrosion cracking might potentially impact anything beyond that. Under the cyclical pressure of the application, this would result in fluid end fatigue failure.

When compared to carbon steel, stainless steel frac fluid-ends have a 2X projected performance life due to their material properties and improved strength. TianyuMfg Stainless Steel ranges from 1,200 to 2,000 plus pump hours. The maximum record that we’ve got so far from our clients is 3680hours in Midland, Texas.

However, life expectancy is affected by multiple conditions, which may include Plunger bore size; smaller bores tend to last longer.

The pressure the fluid end is typically run at also has a definite impact; higher pressure shortens fluid end life than lower pressure service.

Another determinant is the number of hours per day it is pumped, pressure and cycles are the enemies of fluid end life.

And lastly, pumping water, KCL water, or Acid all add to corrosion fatigue of the metal.

FAQ: Can Stainless Steel Fluid End Withstand High Pressures and Highly Corrosive Fluids?

The corrosion resistance, ductility, and high strength of stainless steel alloys are well known.

TianyuMfg Stainless Steel Fluid Ends are made with special metallurgy that increases yield strength and corrosion resistance. TianyuMfg stainless steel fluid ends feature optimum corrosion resistance, which reduces cracking and improves overall longevity, especially in recycled water applications.

FAQ: Are Stainless Steel Fluid Ends Fatigue Cracking Resistant?

Separations or cracks in the fluid end material can be caused by excessive cavitation, fatigue, or impact from external objects. Sand packing and operation outside of pump design parameters might also be problematic.

Deburring shot peening and focused material work-hardening are all techniques that help extend fluid end life. To avoid premature cracking, we additionally use material with a higher yield strength than the industry standard.

Fatigue, cracking, and eventual failure are unavoidable. Fluid ends can, however, be designed to withstand additional fatigue. TianyuMfg stainless steel fluid ends provide just that.

FAQ: Are Stainless Steel Fluid Ends Built to Withstand Washout?

Large amounts of fluid within the block erode sealing surfaces, limiting pressure buildup at the fluid end. Abrasive well stimulation fluids, acids, and higher-strength proppant are more likely to cause this. Another issue is poor maintenance, such as faulty valve and seat installation.

We exclusively utilize top-quality steel that has been forged to the strictest cleanliness standards, as well as high-strength parts that extend the life of the fluid end.

FAQ: Do you Need to Worry About Cavitations in Your Stainless Steel Fluid End?

When well-stimulation fluids are driven to rapid pressure variations, cavities may build up in the liquid at low pressures and collapse at high pressures. Washout from continuous cavitation can cause premature breakdown.

TianyuMfg high-flow parts (valves and seats) provide superior flow characteristics within the fluid end during use. This ensures that well stimulation fluids flow consistently at changing pressures.

FAQ: Are stainless steel fluid end modules easy to maintain?

Since spare components are readily available and the damaged cavities may be replaced, Frac fluid ends can be conveniently maintained and serviced right at the workplace. If necessary, a heat and carbide treatment can be used to extend the part’s service life.

FAQ: Can Stainless Steel Fluid End Minimize Flexing Stress Amplitude for Improved Pressure Cycles?

Stainless steel fluid ends are more durable and resist fatigue cracking, which helps to decrease erosion. Because of the natural break in the stress transfer, the approach improves pressure cycles and reduces cylinder stress. Improved pressure cycles due to reduced flexing stress amplitude.

FAQ: How do you Prevent Sand Packing in Stainless Steel Fluid End?

Inconsistent well stimulation fluid and proppant distribution from the blender, loss of adequate proppant suspension in fluid during operation, and pony rod or power end breakdowns can all result from excessive proppant build-up in a fluid end’s intersecting bore.

Our design eliminates turbulent flow around the valves and allows for unhindered flow. This greatly lowers proppant settling, which can result in sand build-up.

FAQ: What Stainless Steel Fluid Ends does TianyuMfg Manufacture?

TianyuMfg manufacture stainless steel fluid ends for the following well service pumps, 100% compatible and high quality.

WEIR SPM TWS600, all plunger sizes

WEIR SPM TWS2250, all plunger sizes

WEIR SPM QWS1000, all plunger sizes

WEIR SPM QWS2500, all plunger sizes

WEIR SPM QWS2800, all plunger sizes

FMC Pumps, GD Pumps, etc

Contact us to discuss the custom requirements of your stainless steel fluid ends.

QWS2800 stainless steel fluid end bare block

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