China OEM Grooved End Ductile Iron Water Signal Gearbox for Fire Fighting Butterfly Valve synchromesh gearbox

Product Description

Grooved End Ductile Iron Wafer Type Water Butterfly Valve With Signal Gearbox For Fire Fighting

 Pressure and temperature

Working pressure

PN10, PN16, CL150, JIS 5K/10K

Testing pressure

Shell: 1.5 times rated pressure

Seat: 1.1 times rated pressure

Working temperature

-10 °C to 80°C (NBR)

-10 °C to 120°C (EPDM)

-10 °C to 150°C (PTFE)

Suitable media

water, oil and gas


Product detail




Cast iron, Ductile iron, Carbon steel, Stainless steel.




Nickel ductile iron, AI bronze, Stainless steel, Carbon steel, Nylon


Carbon steel, Stainless steel



“O” ring



Stainless steel


Stainless steel


Design Standard

EN 593, MSS SP67, API 609, BS5155

Inspection & Test

API 598, ISO 5208, EN 12266

End Standard

ANSI: B16.1 CL 125LB; B16.5 CL 150LB; B16.47 150LB.

AS: 2129 Table D & E   BS 10 Table D & E

DIN: 2501: PN6, PN10 & PN16

EN: 1092: PN6, PN10 & PN16

ISO 2531: PN6, PN10 & PN16

ISO 7005: PN6, PN10 & PN16

KS: B 1511 / JIS B 2210 5K & 10K

MSS: SP44 CL. 150LB  AWWAC207

SABS: 1123 Table 1000/3 & Table 1600/3

Face to Face

ISO 5752, EN 558, MSS SP67, API 609 and DIN3202

Top Flange

ISO 5211

Different Types of Butterfly Valve

We can produce various types of butterfly valves according to your requirement and drawings.

Production Equipment

Packing & Delivery

Company Profile

LIKE VALVE (ZheJiang ) Co., Ltd locates in ZheJiang -next to the largest sea port in North -ZheJiang seaport; with more than 20 years experienced managing, manufacturing and quality control team; make efforts to produce high level quality valves of China.


Like valve has design research and development, manufacturing, marketing and aftersale services. We have the independent R&D center, advanced manufacturing technology and strictly implement the relevant international standards.

With advanced engineering design approaches, well-developed manufacturing equipment, testing verification facilities and strict QC as per ISO9001 certificate system, we “Like Valve” ensure that each part in every product we supply is in high quality and performance.

We specialize in in water valves: such as butterfly valve, gate valve, check valve, Hydraulic control valve, strainers, WRAS certified material avaiable; and oil and gas valves such as: gate valve, globe valve, ball valve, check valve, strainers etc, with API 6D certificate; also and other series products. We also customize valves in different materials, pressure, size and other products, according to customers requirement.

“Like Valve” products have exported to more than 18 countries: such as USA, Argentina, Brazil, Russia, Spain, UAE, Morroco, India, Bangladesh etc; widely used in water supply and drainage, construction, electricity, oil and gas pipe, petrochemical, metallurgical and other industries. Product ingenuity, high quality and reasonable price, trusted by the user.

Products Categories


Q1: What certificates can you offer?

Q2: Do you accept OEM?

Q3: Can i get a sample?
A:Yes, of course.

Q4:What is your MOQ?
A:1 pcs acceptable, more discount for larger quantity.

Q5:If all products will do test?
A:Sure, our products is tested piece by piece before delivery, no sampling test.

Q6: What is the payment term.
A:T/T, L/C, Credit Card, or other by discussion

Q7: What is delivery time?
A:Common standard commonly material valves in 7-20 days according to quantity

Q8: What is the warranty?
A:Standard valves warranty: 1 year after delivery.


Media: Water
Driving Mode: Manual
Connection Form: Grooved
US$ 27/Piece
1 Piece(Min.Order)


Order Sample



Customized Request

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Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

worm gearbox

What are the Noise Levels Associated with Worm Gearboxes?

The noise levels associated with worm gearboxes can vary depending on several factors, including the design, quality, operating conditions, and maintenance of the gearbox. Here are some key points to consider:

  • Design and Quality: Well-designed and high-quality worm gearboxes tend to produce lower noise levels. Factors such as gear tooth profile, precision manufacturing, and proper alignment can contribute to reduced noise.
  • Gear Engagement: The way the worm and worm wheel engage and mesh with each other can impact noise levels. Proper tooth contact and alignment can help minimize noise during operation.
  • Lubrication: Inadequate or improper lubrication can lead to increased friction and wear, resulting in higher noise levels. Using the recommended lubricant and maintaining proper lubrication levels are important for noise reduction.
  • Operating Conditions: Operating the gearbox within its specified load and speed limits can help prevent excessive noise generation. Overloading or operating at high speeds beyond the gearbox’s capabilities can lead to increased noise.
  • Backlash: Excessive backlash or play between the gear teeth can lead to impact noise as the teeth engage. Proper backlash adjustment can help mitigate this issue.
  • Maintenance: Regular maintenance, including gear inspection, lubrication checks, and addressing any wear or damage, can help keep noise levels in check.

It’s important to note that while worm gearboxes can produce some noise due to the nature of gear meshing, proper design, maintenance, and operation can significantly reduce noise levels. If noise is a concern for your application, consulting with gearbox manufacturers and experts can provide insights into selecting the right gearbox type and implementing measures to minimize noise.

worm gearbox

Does a Worm Reducer Require Frequent Maintenance?

Worm reducers generally require less frequent maintenance compared to some other types of gearboxes due to their design and operating characteristics. However, maintenance is still essential to ensure optimal performance and longevity. Here are some key points to consider:

  • Lubrication: Proper lubrication is crucial for worm gearboxes. Regularly check the lubricant level and quality to prevent wear and overheating. Lubricant should be changed as recommended by the manufacturer.
  • Inspections: Periodically inspect the gearbox for signs of wear, damage, or oil leaks. Check for any unusual noises, vibrations, or changes in performance that could indicate a problem.
  • Tightening and Alignment: Check and tighten any loose fasteners and ensure that the gearbox is properly aligned. Misalignment can lead to increased wear and reduced efficiency.
  • Seal Maintenance: Inspect and maintain seals to prevent oil leakage and contaminants from entering the gearbox.
  • Cleaning: Keep the gearbox clean from debris and contaminants that could affect its performance. Regular cleaning can prevent premature wear and damage.
  • Load and Speed: Ensure that the gearbox is operating within its rated load and speed limits. Exceeding these limits can lead to accelerated wear and potential failure.
  • Environmental Conditions: Consider the operating environment of the gearbox. Extreme temperatures, humidity, and other factors can impact the gearbox’s performance and longevity.

While worm gearboxes are known for their durability and self-locking feature, neglecting maintenance can lead to premature wear, reduced efficiency, and potential breakdowns. Following the manufacturer’s recommendations for maintenance intervals and procedures is essential to keep the worm reducer in optimal condition.

worm gearbox

Preventing Backlash in a Worm Gearbox

Backlash in a worm gearbox can lead to reduced accuracy, positioning errors, and decreased overall efficiency. Here are steps to prevent or minimize backlash:

  • High-Quality Components: Use high-quality worm gears and worm wheels with tight manufacturing tolerances. Precision components will help reduce backlash.
  • Proper Meshing: Ensure the worm gear and worm wheel are properly aligned and meshed. Improper meshing can lead to increased backlash.
  • Preload: Applying a small amount of preload to the worm gear can help reduce backlash. However, excessive preload can increase friction and wear.
  • Anti-Backlash Mechanisms: Consider using anti-backlash mechanisms, such as spring-loaded systems or adjustable shims, to compensate for any inherent backlash.
  • Lubrication: Proper lubrication can reduce friction and play a role in minimizing backlash. Use a lubricant that provides good film strength and reduces wear.
  • Maintenance: Regularly inspect and maintain the gearbox to identify and address any changes in backlash over time.

It’s important to strike a balance between reducing backlash and maintaining smooth operation. Consulting with gearbox experts and following manufacturer guidelines will help you optimize your worm gearbox’s performance while minimizing backlash.

China OEM Grooved End Ductile Iron Water Signal Gearbox for Fire Fighting Butterfly Valve   synchromesh gearbox	China OEM Grooved End Ductile Iron Water Signal Gearbox for Fire Fighting Butterfly Valve   synchromesh gearbox
editor by CX 2023-10-11

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china worm gearbox

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