FAQs of Long Handle Drain Valve

1. What is the Long Handle Drain Valve manufacturing process?

The production process of long handle blowdown valves usually includes the selection of raw materials (such as stainless steel, brass and other materials selected according to specifications), main processing (Casting or forging molding, turning, milling and other precision machining to ensure size accuracy), core component manufacturing (valve core grinding, seal vulcanization molding, long handle stamping and polishing), assembly (valve core, seal, long handle and control structure are assembled in turn), performance testing (pressure resistance, sealing, operation flexibility test) and surface treatment (rust removal, zinc plating, spraying and other corrosion prevention processes), finally packaging and warehousing after quality inspection.

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2.  What is the difference between a long-handle drain valve and an ordinary drain valve?

The core difference between a long-handle blowdown valve and an ordinary blowdown valve lies in the operation structure and the application scene.

The former is equipped with an extended handle that can be operated manually from a long distance or at a high position without the need for additional tools. It is especially suitable for installation at the bottom of equipment, in low-lying areas of pipelines, etc., where space is limited, or access is difficult at close range. The operation is more convenient and safer.
The common sewage valve is typically designed with a short handle or knob, which requires close operation and is relatively limited in its applicability.

In addition, in some industrial scenarios, the handle length of the long-handle blowdown valve can be customized to suit the specific installation environment, while the operating part specifications of the ordinary blowdown valve are usually fixed and less flexible.

3. Can the pharmaceutical industry use this long-handle drain valve? 

This long handle blowdown valve can be used in the pharmaceutical industry, but it needs to choose the material and process version that meets the requirements according to the specific use scenario-if it is made of food grade/pharmaceutical grade materials such as 316L stainless steel, the valve core and seals are made of non-toxic and non-precipitated compliant materials, and after precision polishing, passivation and other surface treatments to avoid medium residues and microbial breeding, it can meet the GMP standards for equipment materials, cleanliness and safety requirements. Adapt to the sewage demand of material transportation and wastewater discharge in the pharmaceutical process.

4. How to calculate the extra cost of a long-handle drain valve?

The extra cost calculation for the custom order of the long-handled blowdown valve shall be calculated in conjunction with the customized content.

• Special material premium: If 316L stainless steel is selected instead of conventional 304, the premium will be calculated based on the difference in material unit price and dosage.
• Structure processing cost, such as prolonged handle lengthening and non-standard connection modes, is calculated based on extra person-hours and process complexity.
• Increased cost of surface treatment, such as pharmaceutical-grade polishing and special coatings, etc.
• Mold opening fee: if it involves a non-standard valve core or valve body structure.

In addition to the production adjustment cost of small-batch customization, the final price will be quoted comprehensively based on the customization demand list, drawing requirements, and order quantity. Furthermore, some customization costs can be reduced according to the amount.

5. When are the payment period of the drain valve?

Plumberstar’s long-handle blowdown valve payment terms need to be combined with the order type and cooperation mode flexible agreement.

Regular foreign trade orders, new customers for the first time, cooperation with 30%-50% deposit, payment before delivery, deposit used to lock capacity and purchase raw materials; long-term stable cooperation with the old customers can negotiate a more relaxed period, such as 20% deposit, see the bill of lading copy payment, or quarterly settlement.

In addition, when L/C payment is adopted, the term shall be subject to the terms of the letter of credit, which is usually linked to the loading of goods and the submission of documents. The details can be determined according to the order amount, customer credit, and the negotiation results of both parties.

6. What is the process flow of a replenishment order for a long-handle blowdown valve?

Long-handle blowdown valve replenishment order processing flow:

1. Customers submit the original order number, product specifications, and replenishment quantity of demand. We check the history of cooperation information and inventory status after rapid feedback quotation and delivery.
2. After confirmation, the customer pays according to the agreement (old customers can continue to use the original payment method). We generate production or issue documents synchronously, arrange delivery within 48 hours when the inventory is sufficient, and complete production according to the negotiation cycle if supplementary production is required.
3. After delivery, the logistics information and bill of lading will be pushed in real time. After the customer signs, we will follow up on the acceptance situation. The whole process will be synchronized by the dedicated docking person to ensure efficient connection.

7. How many years of blowdown valve production experience does your factory have?

Plumberstar Factory has focused on valve manufacturing for nearly 20 years, including over 15 years of specialized R&D and production experience with long-handle blowdown valves. Building on the technical foundation established by early valve manufacturing, a mature production system has been developed, ranging from basic styles to customized special models. The products have been adapted to complex working conditions in many fields such as the chemical industry, pharmacy, and energy. The production experience and quality control capabilities have been verified by buyers from over 50 countries worldwide.

8. Can you modify the Long Handle Drain Valve structure?

We can customize and modify the structure of the long-handle blowdown valve according to the project drawings, adjust the size of the valve body flow passage, optimize the sealing structure, change the handle length and installation mode, or add corrosion-resistant coating to meet the requirements of special working conditions, improve the pressure grade, etc. We have a professional R&D and design team and mature processing technology to realize.

In the modification process, we will first evaluate the technical feasibility of the drawings provided by the customer, clarify the material selection, processing difficulties and cost accounting, and then issue a detailed modification plan and sample sampling plan, and then start mass production after confirmation by the customer; At the same time, all customized and modified products will undergo multi-dimensional testing such as pressure resistance, sealing and durability to ensure that they fully comply with the technical requirements and actual use standards of the project drawings.

9. Is there a cost advantage to sourcing Long Handle Drain Valve from your factory?

1. It eliminates markup costs incurred through multi-tier distribution channels, bypassing profit margins added by first-tier distributors, second-tier wholesalers, and other intermediaries. As a result, the procurement price is typically 15%–30% lower than that offered by trading companies.
2. Factories leverage large-scale raw material procurement and automated production processes to drive down raw material and unit processing costs. They also implement tiered bulk pricing, where larger order volumes translate to more substantial unit price discounts.
3. The factory-direct supply and delivery model removes turnover costs associated with intermediary warehousing and secondary transportation. Additionally, we can flexibly arrange consolidated container shipping or batch deliveries to minimize per-unit logistics expenses.
4. Direct collaboration with our in-house technical team means that customization requests do not incur extra design and prototyping fees often passed on by intermediaries. Furthermore, our full-cycle quality control measures reduce product after-sales repair rates, cutting down on hidden costs related to subsequent maintenance.