1. はじめに
This manual provides essential instructions for the safe and effective installation, operation, and maintenance of the Legend Valve & Fitting T-521NL 3/4" Brass Lead Boiler Drain. Please read this manual thoroughly before proceeding with any procedures to ensure proper function and longevity of the product.
2. 安全情報
警告： この製品には、カリフォルニア州で癌や先天性欠損症、またはその他の生殖障害を引き起こすことが知られている化学物質である鉛が含まれています。 取り扱い後は手を洗ってください。
- 設置およびメンテナンス中は、常に安全メガネや手袋などの適切な個人用保護具 (PPE) を着用してください。
- Ensure the system is depressurized and drained before attempting installation or removal of the valve.
- 最大動作圧力125 PSIを超えないでください。
- 適切な設置方法については、地域の配管工事規則および規制を参照してください。
- If you are unsure about any installation or maintenance steps, consult a qualified plumber.
3.製品オーバーview
The Legend T-521NL is a 3/4-inch brass boiler drain valve designed for low-pressure applications. It features a durable brass body, a cast iron handle, and a steel handle nut, ensuring reliable performance for draining boilers and similar systems. This valve is designed for a maximum cold working pressure (CWP) of 125 PSI.
図1: Legend T-521NL 3/4" Brass Lead Boiler Drain Valve. This image shows the brass valve body with a threaded inlet at the bottom and a threaded outlet angled to the side. A black cast iron handle is visible at the top for manual operation.
4. セットアップとインストール
- 準備： Ensure the boiler or system is completely depressurized and drained of water. Turn off any heat sources.
- 糸の準備: Apply appropriate thread sealant (e.g., PTFE tape or pipe dope) to the male threads of the boiler drain valve.
- インストール: Carefully thread the valve into the designated boiler drain port. Ensure it is hand-tightened first, then use a wrench to tighten it securely. Avoid over-tightening, which can damage the threads or the valve body.
- オリエンテーション: Position the valve so that the outlet port is easily accessible for connecting a hose or directing drainage.
- リークチェック： Once installed, slowly repressurize the system and carefully check for any leaks around the threaded connections. Tighten further if necessary, but do not over-tighten.
5. 操作手順
The T-521NL boiler drain valve is operated manually using the cast iron handle.
- バルブを開くには: Turn the handle counter-clockwise until the valve is fully open. This will allow water to drain from the boiler.
- バルブを閉じるには: Turn the handle clockwise until the valve is fully closed. Do not over-tighten the handle, as this can damage the internal components. A firm hand-tightening is usually sufficient to stop the flow.
Always ensure a hose is connected to the outlet or a suitable container is in place before opening the valve to prevent water damage.
6. メンテナンス
Regular inspection and basic maintenance can extend the life of your boiler drain valve.
- 目視検査: Periodically check the valve for any signs of corrosion, leaks, or physical damage.
- 漏れ検出: If a leak is detected at the threaded connections, ensure the connections are properly tightened. If the leak persists, the thread sealant may need to be reapplied.
- 動作確認: Occasionally operate the valve (open and close) to ensure it moves freely and does not seize.
- クリーニング： バルブの外側を清潔に保ち、ゴミが付着しないようにしてください。
7。 トラブルシューティング
| 問題 | 考えられる原因 | 解決 |
|---|---|---|
| 接続部でのバルブの漏れ | Loose connection, insufficient thread sealant, damaged threads. | Tighten connection, reapply thread sealant, inspect threads for damage and replace if necessary. |
| Valve handle is stiff or difficult to turn | Mineral buildup, lack of use, internal component wear. | Operate valve several times to free it. If problem persists, replacement may be necessary. |
| Valve does not fully close | Debris lodged in valve seat, worn internal components. | Attempt to flush debris by opening and closing rapidly. If issue persists, valve replacement is recommended. |
8. 仕様
- モデル： T-521NL
- 材料： Brass (body), Lead, Steel (handle nut), Cast Iron (handle)
- 接続サイズ： 3/4インチ
- Maximum Operating Pressure (CWP): 125 PSI (ポンド/平方インチ)
- ポート数： 2
- 製品寸法: 3.5 x 3.5 x 2.25インチ（L x W x H）
- 商品の重量: 10.4オンス
- メーカー: LEGEND VALVE FITTING
- 国際コード: 662545083513
9. 保証とサポート
For specific warranty information or technical support regarding your Legend T-521NL boiler drain valve, please contact Legend Valve & Fitting directly. Refer to the official Legend web最新の連絡先情報および保証条件については、サイトまたは製品パッケージをご覧ください。
メーカー: LEGEND VALVE FITTING
Webサイト： Visit the Legend Store on Amazon （ブランド全般の情報）