Frac pump valves

Fluid end valves and seats

TianyuMfg manufactures not only standard API valves and seats but also customized valves and seats as per your drawings.

TianyuMfg manufactures valves and seats in the sizes of API-3# through API-9#. We have been manufacturing a wide variety of valve seat assemblies for both frac pumps and mud pumps, covering various models for the most dominant pumps in the market.

We process the whole heat treatment in-house under strict control, making sure each of your valves and seats meets your specific requirements on the carburizing depth and hardness. We utilize the state of art CNC machines to eliminate distortion of parts and precisely machine the valves and seats to API standards.

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TianyuMfg manufactures and supplies not only frac valves and seats, but also mud pump valves and seats.

All aftermarket valves and seats are 100% interchangeable with original designs. We have been manufacturing various types including full open valves and seats, 3-web valves and seats, Stem guided valves and seats, 4-web valves and seats, Novatech valves and seats, GD valves and seats for many years. All these valves and seats are designed for high performance of maximum impact absorption and service lifetime.

Full open valve and seat feature in a uniform distribution of pressure across the entire diameter of the valve taper, reducing the chances of seat washout and extend fluid end module lifetime. Both of TianyuMfg full open valves and seats are manufactured from single piece, solid body forged- alloy steel.

TianyuMfg fabricates four types of full open valves and seats, they are:

  1. Regular style with snap-on insert
  2. Regular style with bonded insert
  3. Roughneck style
  4. FKN/G2 Style

The 3 web valves and seats with a center-guided design feature in a large bearing area for the vale which minimizes the stress and prolongs service lifetime in high-pressure drilling operations.

4-web, center-guided valve is designed to achieve an easy disassembly and quick change of valve inserts so as to minimize the downtime. This type of valves and seats are widely used in low to medium pressure drilling operations.

TianyuMfg GD valves and seats are manufactured for cementing, fracturing and work over drilling operations, 100% compatible with original/OEM parts.

Novatech valve and seat are four-wing guided full open type. It features high performance and has been approved in the oilfields for years.

TianyuMfg manufactures the valve with a one-piece forging body. We make both Novatech valves with snapped-on inserts and bonded inserts.

The frequently required Novatech valves and seats from our customers are ND-7S12, ND-7V2. If you are looking for other part numbers, contact TianyuMfg for more details.

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Valve seat pullers for HT400, TWS600, QWS2500 and other well service pumps
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QWS2500 fluid ends dressing

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Complete Guide about Frac Pump Valves and Seats

The frac pump valves and seats are also called valve and seat assembly. There are valve body, valve insert, valve seat, and O-ring, these four parts consist of the frac pump valves and seats, which are very critical vulnerable parts in fracturing pumps. In higher pressure frac pumps, the mating surface of the valve body and valve seat is generally a conical surface. Frac valves and seats are the no. 1 expendables cost. 8620H or 20CrMo can be used for forged frac valves and seats. Both the valve body and valve seat would be carburized or nitrided to enhance their impact resistance and wear resistance. Polyurethane is often used as the raw material for the valve insert. Compared with rubber, polyurethane has better strength and elasticity.

This FAQ lists some questions about frac pump valves and seats for you. These FAQs shall be able to answer some queries related to the well-service pump valves and seats.

What are the Most Popular Valves and Seats Used in Oilfields and Their Characteristics?

What are the Novatech Valves and Seats?

What are the Sizes of the Frac Pump Valves and Seats?

What is the Difference between Suction Valve and Discharge Valve of the Frac Pump Valves and Seats?

How do the Frac Pump Valves and Seats Work?

Why are the Frac Pump Valves and Seats the Most Easy Worn Parts?

When to Repalce the Frac Vaves and Seats?

How to Lengthen the Life Span of the Frac Pump Valves and Seats?

FAQ: What are the Most Popular Valves and Seats Used in Oilfields and Their Characteristics?

  1. Three-web Valve: It is a stem-guided three-web seat valve, it features high wear resistance and good service lifetime.
    Three web valve and seat
  2. Four-web Valve: It is also called Supreme Type Valve: It is a stem-guided four web seat valve. The crossed structure valve seat assembly maximizes the service life, as it improves the impact absorption due to flapping the valve body.

  3. Full Open Valve: It is a four-wing guided full open frac valves and seats. The full open design expands the flow area and provides excellent flow traits. It is easier to maintain, assemble and handle lost circulation material better than most conventional style valve seats assembly. There are four types of full pen valves that are popularly used in oilfields:
    • Roughneck type valve and seat
    • Roughneck HP type valve and seat
    • FKN (G2) type valve and seat
    • SW Type vale
  4. GD Type valves and seats

FAQ: What are the Novatech Valves and Seats?

Novatech is a valves and seats manufacturer in the US. Its first welding valves were supplied nationally in 1982. As one of the oldest and strongest frac valves and seat manufacturers, a wide variety of valves & seats manufactured by Novatech are used throughout the world.

Novatech’s four streamlined guide legs full open seat valve have greatly increased the reliability and performance. The web-type valve seat was achieved to maximize the metal-to-metal bearing area. However, the loads applied to the seat webs are not uniform, the flow is not limited because of the Novatech four streamlined guide legs and the metal-to-metal bearing area is regained, the Novatech full open valve seat assembly can keep the impact loads uniformly transmitted to the frac pump fluid end. One-piece valve bodies, the insert retention groove acts as a circular channel beam to add superior rigidity to the valve body.

Its unique design performed extremely reliable, received widely welcome by drilling contractors.

TianyuMfg provides 100% interchangeable frac valves and seats with Novatech’s. Our valves and seats are manufactured by high-quality alloy steel and which is forged integrally. The developed high, medium, and low-end products suit different working conditions for you to choose, including work-over, acidizing, cementing, fracturing, and drilling.

FAQ: What are the Sizes of the Frac Pump Valves and Seats?

The plungers size defines the frac pump fluid end size. The frac pump valves and seats change with the plunger size but not all the same, some fluid ends of different plunger specs also share the valves and seats of the same size. You can find the following charts which list the general sizes of frac pump valves and seats:

Valves and seats sizes for pump TWS600

Item TWS600   2 1/2” TWS600   2 3/4” TWS600 3” TWS600  3 1/2” TWS600   4” TWS600   4 1/2”
Valves seats 3” 3” 3” 3 1/2” 3 1/2” 3 1/2”

 

Valves and seats sizes for pump TWS2250

Item TWS2250     3 3 /4” TWS2250    4” TWS2250 4 1/2” TWS2250   5”
Valves seats 4” 4” 4 1/2” 4 1/2”

 

Valves and seats sizes for pump QWS2500

Item QWS2500   3 3 /4” QWS2500  4” QWS2500 4 1/2” QWS2500  5”
Valves seats 4” 4” 4 1/2” 4 1/2”

Tianyu Mfg. Provides various kinds of frac pump valves and seats. Contact TianyuMfg sales engineer to get the most appropriate valves and seats for your pumps.

FAQ: What is the Difference Between the Suction Valve and Discharge Valve of Frac Pump Valves and Seats?

The frac pump valve section is divided into the suction valve and discharge valve on the drawings. However, in order to make the disassemble and maintenance of the frac pump valve convenient, the suction and the discharge valve body adopt the exactly same design. The suction valve body is located at the lower part of the frac pump fluid end, and the discharge valve is located at the upper part of the frac pump fluid end.

When you are inquiry about the suction or discharge frac valves and seats, Tianyu Mfg. provides the same design frac valves and seats, same as Weir SPM.

FAQ: How do the Frac Pump Valves and Seats Work?

The working principle of frac pump valves and seats is as follows:

By the reciprocating movement of the plunger, the suction valve and the discharge valve continuously open and close. When the suction valve keeps opening and the discharge valve closing, the liquid pours into the frac pump fluid end cylinder cavity through the suction manifold and the suction valve to complete the liquid suction. When the discharge valve keeps opening and the suction valve closing, the liquid discharge from the frac pump fluid end cylinder cavity through the discharge valve land the discharge pipe to complete the liquid discharge.

FAQ: Why are the Frac Pump Valves and Seats the Easiest Wear Parts?

In the operation of the frac pump, the frac pump valves and seats are constantly opening and closing. Therefore, the closing speed of the frac pump valves and seats require special attention. There is a certain impact that emerges due to kinetic energy changing at the closing moment of the frac pump valves. The impact strength is related to the mass and closing speed of the frac pump valves and seats. The greater the mass and speed are, the greater the impact strength will be. The shock is the main factor that triggers the frac pump valves and seats to be damaged. It makes the allowable closing speed is a key parameter of the frac pump valves and seats design.

You need to prepare sufficient spare frac pump valves and seats parts. The quality of frac pump valves and seats directly affect the performance of the frac pump fluid end. Tianyu Mfg. serves low cost and superior performance frac pump valves and seats. As the valve body is manufactured as a one-piece, which increased resistance to abrasion and extrusion, also minimizes insert movement, leakage, and separation from the valve.

FAQ: When to Replace the Frac Pump Valves and Seats?

The life span of frac pump valves and seats varies from district to district. The strike face and the insert is the key point to lengthen the period.

For frac valve assembly, when the insert wear has nibbling but not bridged across the surface, the valve has even worn but no chips or washouts and function is still good, keep them working.

When the insert is almost damaged across the surface and caused the valve to leak, replace the insert. After replacing, no leakage keeps them working. Leakage till happened, replace the frac pump valve body. The leakage caused by the insert failure would arise the valve washout and fail easily tend to rapid erosion.

For valve seat assembly, when the strike face wear is 0.06 inch (1.5mm) deep, replace the valve seat.

FAQ: How to Lengthen the Life Span of the Frac Pump Valves and Seats?

Increasing the metal-to-metal bearing area between the valve and seat is the only method to lengthen the life span of the frac pump valves and seats. The bigger this area, the bigger the area to absorb the high-impact energy from valve closing. We recommend the following tips for you as a reference.

  1. The frac valves seats assembly should be opened and closed in time. The closing speed and hysteresis angle must be less than the allowable value. In this way, the shock strength emerges in the open and closing would be reduced.
  2. Ensure the stabilization of sealing, lessen or avoid the leakage after the frac pump valves closed.
  3. Minimize the loss due to hydraulic resistance.
  4. Choosing suitable valves material according to different conveying media, and the rigidity and strength of the materials must meet relevant.

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